START Experiments recorded for Dr. M. Filella, University of Geneva from SC-Database on Saturday, 01 January, 2000 at 00:10:19 Software version = 5.81 Data version = 4.62 Experiment list contains 101 experiments for (no ligands specified) 2 metals : Nb(V), Nb++++ (no references specified) (no experimental details specified) ***************************************************************************** e- HL Electron (442) Electron; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) vlt oth/un 25°C 1.00M U 1965MHb (709) 1 K'=14.40, 426 mV K': Nb6Cl12++++ + 2e=Nb6Cl12++. ----------------------------------------------------------------------------- Nb(V) vlt oth/un 25°C 12MM U 1954CVa (710) 2 K(Nb+e)=-3.60, -213 mV Medium 12 M HCl ----------------------------------------------------------------------------- Nb(V) oth none 25°C 0.0 U 1952LAb (711) 3 K=-54.4(-650 mV) K(Nb(III)+3e)=-56 (-1100 mV) K: 0.5Nb2O4(s)+5H+5e=Nb(s)+2.5H2O. From thermodynamic data ----------------------------------------------------------------------------- Nb(V) EMF oth/un 18°C 6.25M U I 1938GGa (712) 4 K=-10.84(-313 mV) Medium:H2SO4. K: Nb+2e=Nb(III). At I=4.95 M: K=-10.74(-310 mV), 3 M: -12.02 (-347 mV). Also at 18 C. At I=0: K(NbO+2H+2e=Nb(III)+H2O)=-11.88(-343 mV) ----------------------------------------------------------------------------- Nb(V) EMF oth/un 25°C 9.87M U I 1928KHa (713) 5 K=-14.41(-426.1 mV) Medium: H2SO4. K(Nb+2e=Nb(III). At I=5.9: K=-13.02(-384.9 mV), I=3: -12.62 (-373.0 mV) ***************************************************************************** Br- HL Bromide CAS 10035-10-6 (19) Bromide; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 25°C var M 1973LJb (2150) 6 K(NbOOHL4+H+L=NbOL5+H2O)=-5.2 Medium: HBr ***************************************************************************** Cl- HL Chloride CAS 7647-01-0 (50) Chloride; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) cal non-aq 25°C 100% U HM 1993DSb (5278) 7 Metal:Nb(IV). Medium:iso-Propyl ether. DH(Nb(H-1A)2B2(s)+2HL=NbL2(H-1A)2+ 2HB)=-216.4 kJ mol-1. A:Cyclopentadiene. B:CH3. Also for B=PhS and p-ClC6H4S ----------------------------------------------------------------------------- Nb(V) dis KCl var U 1968SSf (5279) 8 Kd(Nb+4Cl+3TBP(benzene))=-1.8 ***************************************************************************** F- HL Fluoride CAS 7644-39-3 (201) Fluoride; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) ISE non-aq ? 100% C 1978GRa (7039) 9 K6=6.88 K(NbF5+NbF6=Nb2F11)=1.32 Medium: liquid anhydrous HF ----------------------------------------------------------------------------- Nb(V) sp mixed ? 20% U 1973LCa (7040) 10 K(NbH2O2+F)=2.62 K(NbH2O2+2F)=1.72 K(NbH2O2+3F)=1.58 K(NbH2O2+4F)=1.52 Medium: 20% H2SO4 ----------------------------------------------------------------------------- Nb(V) ISE NaClO4 25°C 0.50M U 1972LOa (7041) 11 K(NbOF2+F)=3.80 K(NbOF3+F)=4.30 K(NbOF4+F)=4.51 K(NbOF5+F)=4.67 Medium: (Na,H)ClO4. Nb(V)=NbO+++. K(NbOF6+2H+F=NbF7+H2O)=11.4; K(NbF7+F)=3.08, K(NbF8+F)=4.0 ----------------------------------------------------------------------------- Nb(V) EMF KCl 25°C 3.0M U 1970NEb (7042) 12 K(Nb(OH)2F4+F)=2.51 ----------------------------------------------------------------------------- Nb(V) dis NaClO4 25°C 5.0M U T 1969ESa (7043) 13 K6K7=10.66 ----------------------------------------------------------------------------- Nb(V) sp oth/un ? 17.0M U K1=7.12 1969PEc (7044) 14 Medium: H2SO4 ----------------------------------------------------------------------------- Nb(V) sol KNO3 18?°C 0.50M U 1967BNd (7045) 15 Ks(Nb(OH)2F(s))=-5.22 K(Nb(OH)4F+HF=Nb(OH)4F2+H)=3.6 K(Nb(OH)4F+F)=6.8 In 3 M HNO3: Ks(Nb(OH)4F2(s)=Nb(OH)4F2)=-4.82, K(Nb(OH)3F2+HF=Nb(OH)2F3)=4.2 ***************************************************************************** I- HL Iodide CAS 10034-85-2 (20) Iodide; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) cal non-aq 25°C 100% U HM 1993DSb (8273) 16 Metal:Nb(IV). Medium: Toluene or iso-Propyl ether. DH(Nb(H-1A)2B2(s)+2I2= NbI2(H-1A)+2BI)=-289.9 kJ mol-1. A:Cyclopentadiene. B:CH3. ***************************************************************************** OH- HL Hydroxide (57) Hydroxide; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) gl KCl 25°C 3.00M C I 1994EFa (11777) 17 K(Nb6O19+H=HNb6O19)=13.63 K(Nb6O19+2H=H2Nb6O19)=23.55 K(Nb6O19+3H=H3Nb6O19)=32.90 Values at I=0 corr: K=16.11, K(Nb6O19+2H)=27.97, K(Nb6O19+3H)=39.91. K(Nb2O5(s)+5H2O=2Nb(OH)5)=-9.71. K(6Nb(OH)5=H3Nb6O19+5H)=-14.46. ----------------------------------------------------------------------------- Nb(V) dis NaClO4 25°C 0.10M U 1970GFb (11778) 18 *B(NbO2+H2O=NbO2OH+H)=-3.2 Medium: LiClO4 ***************************************************************************** O2-- H2L Peroxide CAS 7772-84-1 (2813) Peroxide; -O.O- ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 25°C 95% U T H 1971VZa (12683) 19 K(NbOSO4+H2L)=3.67 Medium:95% H2SO4. K=3.83(15 C), 3.53(35 C), 3.41(45 C). DH=-25 kJ mol-1 63% H2SO4. K=2.73(25 C), 2.56(35 C), 2.42(45 C). DH=-29 ----------------------------------------------------------------------------- Nb(V) sp oth/un 0°C 10% U 1969CKa (12684) 20 K(NbOSO4+H2L)=5 Medium: 10% H2SO4 ----------------------------------------------------------------------------- Nb(V) EMF KCl 0°C 1.0M U 1969SPc (12685) 21 K(3NbO2L+H=HNb3O6L3)=13.08 K(3NbL3+3H2O+H=HNb3O3L6+3H2L)=4.50. In 3 M KCl: K(NbL4+OH=NbOL3+HL)=1.5, K(HNbOL3+H2L+OH=NbL4+2H2O)=3.3 ----------------------------------------------------------------------------- Nb(V) sp oth/un ? var U 1966BNa (12686) 22 K(Nb(OH)4HL+H)=2.7 ----------------------------------------------------------------------------- Nb(V) sp mixed 23°C 97% U 1957AHb (12687) 23 K(2Nb(V)+3H2L)=12.70 Medium: 97.2% H2SO4. ----------------------------------------------------------------------------- Nb(V) sp oth/un ? 96% U 1956SSc (12688) 24 K(Nb(V)+H2L)=3.6 ***************************************************************************** SCN- HL Thiocyanate CAS 463-56-9 (106) Thiocyanate; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp alc/w ? 100% U I K1=3.58 B2=6.74 1964GSc (15186) 25 B3=9.23 Medium:MeOH. In BuOH: K1=4.37, B2=8.58, B4=16.92. In Me2NCHO: K1=3.08, B2=6.11, B3=8.92, B4=11.55, B5=14.45, B6=16.72, B7=19.28. Nb added as NbCl5 ***************************************************************************** SO4-- H2L Sulfate CAS 7664-93-9 (15) Sulfate; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) ix oth/un 20°C var U 1969MNc (16395) 26 K(NbO(OH)2+L)=1.7 Medium: H2SO4. By distribution: K(NbO(OH)2+2L+2H=NbOL2+2H2O)=3.12 In NH42SO4: K(NbO(OH)3L+L+H=NbO(OH)2L+H2O)=1.09 ----------------------------------------------------------------------------- Nb(V) sp oth/un 22°C 10.0M U 1966GAc (16396) 27 B(Nb(III)4Nb2)=4.3? Medium: H2SO4 ***************************************************************************** CH4O L Methyl alcohol CAS 67-56-1 (597) Methanol; CH3.OH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) EMF alc/w 20°C 100% U 1971GSa (17891) 28 K(Nb+3L=Nb(H-1L)3+3H) > 1 K(Nb(H-1L)3+H-1L)=14.3 Medium: MeOH, 1 M Me4NCl ----------------------------------------------------------------------------- Nb(V) EMF alc/w 20°C 100% U M 1965GBa (17892) 29 K(NbA(L')4+2L'=Nb(L')6+A)=5.1 K(Nb(H-1L)4+A)=10.84 K(NbA(H-1L)3+L)=12.4 K(Nb(L')5+HA=NbA(L')4+L)=5.18 Method: H electrode. Medium: MeOH, 1.0 M Me4NCl. L'=H-1L; HA=acetylacetone ----------------------------------------------------------------------------- Nb(V) EMF alc/w 20°C 100% U M 1965GBa (17893) 30 K(NbAL'3+H2A+L'=NbA2L'2)=13.9 K(NbA2L'2+H2A+L'=NbA3L')=7.0 K(NbA(L')3+L'=NbA(L')4)=7.89 K(NbAL'4+NbAL'3=Nb2A2L'7)=2.5 Method: H electrode. Medium: MeOH, 1.0 M Me4NCl. L'=H-1L; H2B=catechol ----------------------------------------------------------------------------- Nb(V) EMF alc/w 20°C 100% U 1964GUa (17894) 31 K(Nb(H-1L)4+H-1L)=10.45 K(Nb(H-1L)5+H-1L)=5.45 K(Nb(H-1L)6+H=Nb(H-1L)5)=6.15 K(Nb(H-1L)7+H=Nb(H-1L)6)=11.15 Method: H electrode. Medium: MeOH, 1.0 M Me4NCl ----------------------------------------------------------------------------- Nb(V) EMF alc/w 20°C 100% U 1964GUa (17895) 32 K(NbO(H-1L)2+H-1L)=10.51 K(NbO(H-1L)4+H)=6.03 Method: H electrode. Medium: MeOH, 1.0 M Me4NCl ***************************************************************************** C2H2NBr L CAS 590-17-0 (4217) Cyanomethyl bromide; Br.CH2.CN ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1971MBa (18364) 33 K(NbCl5A+L=NbCl5L+A)=0.99 K(NbCl5B+L=NbCl5L+B)=0.43 Medium: CHCl3. A=cyanomethyl fluoride, B=cyanomethyl chloride ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1971MBa (18365) 34 K(NbCl5A+L=NbCl5L+A)=0.55 K(NbCl5A+L=NbCl5L+A)=0.37 Medium: CHCl3. A=cyanomethyl fluoride, B=POCl3 ***************************************************************************** C2H2NI L CAS 624-75-9 (4219) Cyanomethyl iodide; I.CH2.CN ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1972MBb (18366) 35 K(NcCl5A+L=NbCl5L+A)=0.75 K(NbCl5B+L=NbCl5L+B)=1.18 K(NbCl5C+L=NbCl5L+C)=0.64 Medium: CHCl3. A=cyanomethyl bromide, B=cyanomethyl chloride, C=Et2O ***************************************************************************** C2H2O4 H2L Oxalic acid CAS 144-62-7 (24) Ethanedioic acid; (COOH)2 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sol NaClO4 ? ? U 1970ZPa (18980) 36 K3=6.17 Metal ion is NbO+++. Medium : HClO4 ----------------------------------------------------------------------------- Nb(V) sol oth/un 18°C 0.50M U B2=35.9 1968BMb (18981) 37 Metal ion is NbO+++ ----------------------------------------------------------------------------- Nb(V) sol oth/un 18°C 0.50M U 1968BMb (18982) 38 K(NbO(OH)2+L)=9.08 ----------------------------------------------------------------------------- Nb(V) dis NaCl 20°C 4.50M U 1967KOd (18983) 39 Medium: 4.5(NaCl or NaNO3+2.5 M H). K(Nb(OH)4+H2L=Nb(OH)4HL+H)=3.55 K(Nb(OH)4+2H2L=Nb(OH)2L2+2H)=5.13 ----------------------------------------------------------------------------- Nb(V) EMF oth/un 25°C 0.50M U 1967NSb (18984) 40 K(Nb(OH)4+2HL)=12.11 K(Nb(OH)4+2HL+L)=17.15 ***************************************************************************** C2H3N L Cyanomethane CAS 75-05-8 (1399) Acetonitrile; CH3.CN ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1974GMa (19189) 41 K(NbBr5A+L=NbBr5L+A)=0.15 Medium: CH2Cl2. A=t-butylcyanide ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1972MBb (19190) 42 K(NbCl5A+L=NbCl5L+A)=0.46 Medium: CHCl3. A=1,4-dioxan ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1971MBa (19191) 43 K(NbCl5A+L=NbCl5L+A)=0.76 Medium: CHCl3. A=1-chloro-4-cyanobenzene. K=0.34, A=cyanobenzene; K=0.68, A=cyanoethane; K=0.38, A=dimethylether. ***************************************************************************** C2H6NOCl2P L CAS 667-43-0 (910) Dichloro(dimethylamine)phosphine oxide; (CH3)2N.P(O)Cl2 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1974GMa (21900) 44 K(NbBr5A+L=NbBr5L+A)=0.72 Medium: CH2Cl2, A=acetonitrile ***************************************************************************** C2H6O L CAS 115-10-6 (4214) Dimethyl ether; CH3.O.CH3 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -40°C 100% U M 1972MBb (22019) 45 K(NbCl5A+L=NbCl5L+A)=0.08 Medium: CHCl3. A=dioxan. K=0.38, A=1-chloro-4-cyanobenzene (-60 C) ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1971MBa (22020) 46 K(NbCl5A+L=NbCl5L+A)=0.38 Medium: CHCl3. A=1-chloro-4-cyanobenzene ***************************************************************************** C2H6S L CAS 75-18-3 (151) Dimethyl sulfide; CH3.S.CH3 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1974GMa (22190) 47 K(NbBr5A+L=NbBr5L+A)=1.52 Medium: CH2Cl2, A=t-butylcyanide ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1972MBb (22191) 48 K(NbCl5A+L=NbCl5L+A)=1.32 Medium: CHCl3. A=t-butylnitrile ***************************************************************************** C3H4O4 H2L Malonic acid CAS 141-82-2 (79) Propanedioic acid; CH2(COOH)2 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis NaCl 20°C 4.50M U T 1967KOd (24509) 49 Medium:4.5(NaCl or NaNO3+2.5 HCl). K(Nb(OH)4+H2L=Nb(OH)4HL+H)=1.72 ***************************************************************************** C3H9O4P L CAS 512-56-1 (2431) Trimethyl phosphate; (CH3O)3.P:O ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1972BMb (28024) 50 K(NbCl5L+A=NbCl5A+L) > 2.0 K(NbCl5OPCl3+L=NbCl5L+OPCl3) > 7.0,. A=tris(dimethylamino)phosphine oxide Medium: CHCl3 ***************************************************************************** C4H6O4 H2L Succinic acid CAS 110-15-6 (112) 1,4-Butanedioic acid; HOOC.CH2.CH2.COOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis NaCl 20°C 4.50M U 1967KOd (30004) 51 K(Nb(OH)4+H2L=Nb(OH)4HL+H)=1.53, Medium: (NaCl or NaNO3+2.5 HCl) ***************************************************************************** C4H6O5 H2L Malic acid CAS 617-48-1 (393) 2-Hydroxybutane-1,4-dioic acid, Hydroxy-succinic acid; HOOC.CH2.CH(OH).COOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis NaCl 20°C 4.50M U 1967KOd (30682) 52 K(Nb(OH)4+H2L=Nb(OH)4HL+H)=2.01. Medium: NaCl or NaBO3 + 2.5 M HCl ***************************************************************************** C4H6O6 H2L L-Tartaric acid CAS 87-69-4 (92) L-Tartaric acid, L-2,3-Dihydroxybutanedioic acid; HOOC.CH(OH).CH(OH).COOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis KCl 20°C 1.00M U B2=33.5 1971LFc (31314) 53 Metal ion: NbO+++ ----------------------------------------------------------------------------- Nb(V) oth oth/un ? ? U K1=25.15 B2=33.00 1969EMa (31315) 54 Metal ion: NbO+++ ----------------------------------------------------------------------------- Nb(V) dis NaCl 20°C 4.50M U 1967KOd (31316) 55 K(Nb(OH)4+H2L=Nb(OH)4HL+H)=2.34. Medium: NaCl or NaNO3 + 2.5 M HCl ***************************************************************************** C4H7NO4 H2L Aspartic acid CAS 56-84-8 (21) Aminobutanedioic acid; H2N.CH(CH2.COOH).COOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis KNO3 20°C 2.00M U 1969KOb (31898) 56 K(NbO2+H2L)=4.82 Medium: HNO3 ***************************************************************************** C4H8OS L 1,4-Thioxane CAS 15980-15-1 (4266) 1,4-Oxathiane; cyclo(-O.CH2.CH2.S.CH2.CH2-) ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1972MBb (33190) 57 K(NbCl5A+L=NbCl5L+A)=0.08 Medium: CHCl3. A=t-butyl nitrile ***************************************************************************** C4H8S L CAS 110-01-0 (150) Tetrahydrothiophene; cyclo(-CH2.CH2.S.CH2.CH2-) ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U 1972MBb (33739) 58 K(NbCl5A+L=NbCl5L+A)=1.80 A=t-butyl mercaptan. Medium: CHCl3 ***************************************************************************** C4H8S2 L 1,4-Dithiane CAS 505-29-3 (4255) 1,4-Dithiane; cyclo-(S.CH2.CH2.S.CH2.CH2-) ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U 1972MBb (33743) 59 K(NbCl5A+L=NbCl5L+A)=0.16 A=t-butyl nitrile. Medium: CHCl3 ***************************************************************************** C4H10O L Ether CAS 60-29-7 (3573) Diethyl ether (ethyl ether, ethoxyethane); C2H5.O.C2H5 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1972MBb (34652) 60 K(NbClA+L=NbClL+A)=0.11 A=cyanomethyl bromide. Medium: CHCl3. When A=cyanomethyl chloride, K=0.54 ***************************************************************************** C4H10S L CAS 352-93-2 (4259) Diethyl sulfide; C2H5.S.C2H5 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1974GMa (34719) 61 K(NbBr5A+L=NbBr5L+A)=0.59 A=t-butyl nitrile. Medium: CH2Cl2 ----------------------------------------------------------------------------- Nb(V) nmr non-aq -40°C 100% U M 1972MBb (34720) 62 K(NbCl5A+L=NbCl5L+A)=0.66 A=dimethyl ether. Medium: CHCl3. When A=acetone, K=0.88 ***************************************************************************** C5H8O2 HL Acetylacetone CAS 123-54-6 (164) Pentane-2,4-dione; CH3.CO.CH2.CO.CH3 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) EMF non-aq 20°C 100% U M 1971GSa (38035) 63 K(NbA5+HL=NbA4L+HA)=5.18 K(NbA3L+A)=12.40 K(NbA4L+2A=NbA6+L)=5.06 Medium: CH3OH, 1 M Me4NCl. A=CH3OH ***************************************************************************** C5H9N L t-Butylnitrile CAS 7188-38-7 (913) t-Butylcyanide;(CH3)3C.CN ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1974GMa (38453) 64 K(NbBr5A+L=NbBr5L+A)=1.68 Medium: CH2Cl2, A=dimethylether ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1972MBb (38454) 65 K(NbCl5A+L=NbCl5L+A)=0.42 Medium: CHCl3. A=dimethyl ether. When A=1,4-dioxan, K=0.50 ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1971MBa (38455) 66 K(NbCl5A+L=NbCl5L+A)=0.04 Medium: CHCl3. A=cyanomethane. When A=cyanoethane, K=0.72 ***************************************************************************** C6H6N2O2 HL Cupferron CAS 135-20-6 (637) N-Nitrosophenylhydroxylamine; C6H5.N(OH).NO ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp alc/w 25°C 50% U 1967LSb (43419) 67 K(NbOL2+L)=4.83 Medium: 50% EtOH, 0.1 M (NH4)2SO4 ***************************************************************************** C6H6O2 H2L Catechol CAS 120-80-9 (534) 1,2-Dihydroxybenzene, pyrocatechol; HO.C6H4.OH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) EMF alc/w 20°C 100% U M 1971GSa (43797) 68 K(NbA3L+A)=7.89 K(NbA3L+NbA4L=Nb2A7L2)=2.50 K(NbA3L+H2L+A=NbA2L2+2HA)=13.9 K(NbA2L2+H2L+A=NbAL3+2HA)=6.98 Medium: MeOH, 1.0 M Me4NCl. HA=CH3OH ***************************************************************************** C6H6O3 H3L Pyrogallol CAS 87-66-1 (696) 1,2,3-Trihydroxybenzene; C6H3(OH)3 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 23°C 96% U 1981BVa (43971) 69 K(Nb(V)+H3L)=5.62 Medium: 96% H2SO4. In 85%: K(Nb(V)+H3L)=2.30 ***************************************************************************** C6H7NO3S HL CAS 599-71-3 (4398) Benzenesulfohydroxamic acid; C6H5.SO2.NH.OH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 20°C 1.0M U M 1971GVa (45071) 70 Medium: 1-10 M HCl. K(NbOCl5+2H2L=(H2L)2NbOCl5)=4.91 ***************************************************************************** C6H8O6 H2L Ascorbic acid CAS 50-81-7 (285) Ascorbic acid (Vitamin C); ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un ? ? U K1=9.4 1966SAb (45649) 71 ***************************************************************************** C6H8O7 H3L Citric acid CAS 77-92-9 (95) 2-Hydroxypropane-1,2,3-tricarboxylic acid; HOOCCH2.CH(OH)(COOH).CH2COOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis oth/un 20°C 4.50M U 1967KOd (46195) 72 Medium: 4.5(NaCl or NaNO3+2.5 HCl). K(Nb(OH)4+H3L=Nb(OH)4H2L+H)=2.94 ? ***************************************************************************** C6H12O7 HL Gluconic acid CAS 526-95-4 (904) D-Gluconic acid, 2,3,4,5,6-Pentahydroxyhexanoic acid; HO.CH2(CHOH)4.COOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) gl oth/un 25°C 0.10M U 1968LOb (49738) 73 K(Nb(OH)n+L)=2.78 K(Nb(OH)nH-1L+H)=7.82 ***************************************************************************** C7H4NCl L CAS 1885-81-0 (4433) 1-Chloro-4-cyanobenzene; Cl.C6H4.CN ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1971MBa (52380) 74 K(NbCl5A+L=NbCl5L+A)=1.91 A=cyanomethyl bromide. When A=cyanomethyl iodide, K=1.16 ***************************************************************************** C7H5N L Cyanobenzene CAS 100-47-0 (4406) Cyanobenzene, benzonitrile; C6H5.CN ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) nmr non-aq -60°C 100% U M 1971MBa (52569) 75 K(NbCl5A+L=NbCl5L+A)=0.04 Medium: CHCl3. A=dimethyl ether ***************************************************************************** C7H6O3 H2L Salicylic acid CAS 69-72-7 (14) 2-Hydroxybenzoic acid, Salicylic acid; HO.C6H4.COOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 25°C 0.04M U 1962BVa (54266) 76 K(NbO+2L)=22.60 ***************************************************************************** C7H6O4 H3L Protocatechuic CAS 99-50-3 (875) 3,4-Dihydroxybenzoic acid; C6H3(OH)2.COOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 20°C 0.10M U 1964SHa (54685) 77 K(NbO2+H3L=NbO2LH2+H)=2.3 K(NbO2LH2+H3L=NbOL2H2+H)=1.3 K(NbO2+3HL+4H)=63.1 ***************************************************************************** C7H7NO3 H2L CAS 89-73-6 (204) 2-Hydroxybenzohydroxamic acid (salicylhydroxamic acid); HO.C6H4.CO.NHOH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 20°C dil U M 1972LVa (55604) 78 K(NbOCl5+2H3L)=4.58 ***************************************************************************** C9H6N2O5S H2L CAS 5263-74-1 (2738) 7-Nitroso-8-hydroxyquinoline-5-sulfonic acid; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) gl alc/w 27°C 50% C H K1=6.15 B2=11.53 1986EAa (63877) 79 ***************************************************************************** C9H7N3O2S H2L TAR CAS 2246-46-0 (707) 4-(2'-Thiazolylazo)-resorcinol; C3H2NS.N:N.C6H3(OH)2 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp alc/w 25°C 50% U 1967NPb (64716) 80 K(NbO3+H2L)=9.5(?) Medium: 50% MeOH, 0.1 M NaClO4 ***************************************************************************** C10H8O8S2 H4L Chromotropic ac CAS 148-25-4 (1875) 1,8-Dihydroxynaphthalene-3,6-disulfonic acid; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp NaCl 20°C 0.10M U I 1964SHa (69962) 81 K(NbO2+3L+4H)=64.7 In 3 M NaClO4: K(NbO2+2H+2L)=42.5 ***************************************************************************** C10H12O5 H3L CAS 121-79-9 (3895) 3,4,5-Trihydroxybenzoic acid propyl ester; (HO)3.C6H2.CO.O.CH2.CH2.CH3 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp mixed 22°C 5% U 1968LSc (71685) 82 K(?)=3.48 Medium: 5% 1-PrOH, carbonate buffer ***************************************************************************** C10H16N2O8 H4L EDTA CAS 60-00-4 (120) 1,2-Diaminoethane-N,N,N',N'-tetraethanoic acid, Sequestric acid; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis KNO3 20°C 2.0M U 1969KKf (73986) 83 K(NbO2+H3L)=10.54 ----------------------------------------------------------------------------- Nb(V) vlt KCl ? 0.40M U K1=39.4 1969SVd (73987) 84 ----------------------------------------------------------------------------- Nb(V) vlt oth/un 20°C 1.0M U 1967VSd (73988) 85 K(Nb(OH)2+L)=40.78 ***************************************************************************** C11H9N3O2 H2L PAR CAS 1141-59-9 (636) 4-(2'-Pyridylazo)-1,3-dihydroxybenzene; C5H4N.N:N.C6H3(OH)2 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 25°C ? U 1967ADa (77564) 86 K(?)=4.3 ***************************************************************************** C13H11NO2 HL CAS 304-88-1 (181) N-Phenylbenzohydroxamic acid; C6H5.CO.N(C6H5).OH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis KCl 20°C 1.0M U 1971LFc (85167) 87 B((NbO)L3)=53.1 ***************************************************************************** C14H8O7S H3L DASA CAS 83-61-4 (950) 1,2-Dihydroxyanthraquinone-3-sulfonic acid, Alizarin Red S; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un ? ? U 1968ADa (86745) 88 B((NbO)L2)=8.33 ***************************************************************************** C14H15N4OBr HL CAS 14337-50-9 (5095) 5-(5-Bromo-2-pyridylazo)-2-ethylamino-4-hydroxy-1-methylbenzene; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un ? ? U M 1969EMa (87766) 89 K(NbOA+L)=20.63 H2A=tartaric acid. ***************************************************************************** C14H16N4O HL PAAC CAS 13059-69-3 (5067) 5-Ethylamino-4-methyl-2-(2'-pyridylazo)phenol; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un ? ? U M 1969EMa (88019) 90 K(NbOA+L)=21.0 H2A=tartaric acid ***************************************************************************** C14H22N2O8 H4L CDTA CAS 482-54-2 (200) trans-1,2-Diaminocyclohexane-N,N,N',N'-tetraethanoic acid; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) vlt oth/un 25°C 2.0M U 1970PLa (88728) 91 K(?)=15.60 pH 5 ***************************************************************************** C15H13NO2 HL CAS 7369-44-0 (4066) N-3-Diphenylpropenohydroxamic acid; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) dis KCl 20°C 1.0M U 1971LFc (91639) 92 K(NbO+3L=59.7 ***************************************************************************** C15H18N4O HL CAS 14337-52-1 (5124) 5-Diethylamino-2-(2-pyridylazo)phenol; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un ? ? U M 1969EMa (92097) 93 K(NbOA+L)=20.63 H2A=tartaric acid ***************************************************************************** C16H11N2O5ClS H3L CAS 3567-23-5 (5202) 5-Chloro-2-hydroxy-3-(2-hydroxy-1-naphthylazo)-benzenesulfonic acid; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) EMF oth/un ? ? U M 1971ENc (92770) 94 K(NbOA+L)=27.5 H2A=tartaric acid ***************************************************************************** C16H11N3O10S2 H4L (5174) 2-Hydroxy-1-(2'-hydroxy-4'-nitro)phenylazo-3,6-disulfonaphthalene; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 25°C ? U 1971RCd (92882) 95 K(?)=5.51 ***************************************************************************** C17H17NO3 HL CAS 58434-59-6 (1213) 2'-Hydroxy-4-methoxy-5'-methylbenzylidene acetophenone oxime ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 30°C 8.00M U M 1980GKa (96190) 96 K(NbO(SCN)+L)=2.67 K(NbO(SCN)L+L)=2.27 ***************************************************************************** C17H21N5O HL (5223) 3-Amino-1-hydroxy-6-(2-N-methylanabasinyl-alpha-azo)benzene; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un ? ? U 1967TTa (96389) 97 K(?)=11.36 ***************************************************************************** C31H32N2O13S H6L Xylenol orange CAS 63721-85-5 (432) 5,5'-Bis-N,N-bis(carboxymethyl)aminomethyl-4'-hydroxy-3,3'-dimethylfuchsone-2"-sulfonic acid; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb(V) sp oth/un 25°C ? U 1967ADc (105482) 98 K(?)=4.7 ***************************************************************************** CH4O L Methyl alcohol CAS 67-56-1 (597) Methanol; CH3.OH ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb++++ EMF alc/w 20°C 100% U 1971GSa (17896) 99 K(Nb(L')2+L')=12.6 K(2Nb(L')3+3L'=Nb2(L')9)=23.9 Medium: MeOH, 1 M LiCl ***************************************************************************** C11H9N3O2 H2L PAR CAS 1141-59-9 (636) 4-(2'-Pyridylazo)-1,3-dihydroxybenzene; C5H4N.N:N.C6H3(OH)2 ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb++++ sp oth/un ? ? U M 1969EMa (77565) 100 K(NbOA+L)=21.22 H2A=tartaric acid ***************************************************************************** C22H14N4O16Cl2S4 H8L ClSulfophenol S CAS 2103-73-3 (4156) 2,7-Bis(5'-chloro-2'-hydroxy-3'-sulfo-phenylazo)chromotropic acid; ----------------------------------------------------------------------------- Metal Mtd Medium Temp Conc Cal Flags Lg K values Reference ExptNo ----------------------------------------------------------------------------- Nb++++ sp KNO3 20°C 0.20M U 1965BSe (101484) 101 B(NbO2+6H+L)=53.0 Metal: Nb(III) REFERENCES 1994EFa N Etxebarria,L Fernandez,J Madariaga; J.Chem.Soc.,Dalton Trans.,3055 (1994) 1993DSb H Diogo,J Simoni et al; J.Am.Chem.Soc.,115,2764 (1993) 1986EAa M El-Haty,F Adam; Bull.Soc.Chim.Fr.,I,351 (1986) 1981BVa F Bajraktari,D Veselinovic et al; Bull.Soc.Chim.Beograd,46,291 (1981) 1980GKa S Gholse,R Kharat; Indian J.Chem.,19A,823 (1980) 1978GRa R Gut,J Rueede; J.Coord.Chem.,8,47 (1978) 1974GMa R Good,A Merbach; Helv.Chim.Acta,57,1192 (1974) 1973LCa G Latysh,A Chernyak,T Serebrennikova; Zh.Neorg.Khim.,18,1014(E:533) (1973) 1973LJb J Land,M Jackson; J.Less Common Metals,33,283 (1973) 1972BMb J Bunzli,A Merbach; Helv.Chim.Acta,55,2867 (1972) 1972LOa J Land,C Osborne; J.Less Common Metals,92,147 (1972) 1972LVa F Lobanov,V Voskov,I Gibalo et al; Zh.Neorg.Khim.,17,10,2683 (1972) 1972MBb A Merbach,J Bunzli; Helv.Chim.Acta,55,580 (1972) 1971ENc S Elinson,T Nezhnova; Zh.Anal.Khim.,26,8,1535 (1971) 1971GSa R Gut,E Schmid,J Serrallach; Helv.Chim.Acta,54,593;609 (1971) 1971GVa I Gibalo,V Voskov,L Kulikova et al; Zh.Anal.Khim.,26,11,2145 (1971) 1971LFc F Lobanov,V Feskova,I Gibalo; Zh.Neorg.Khim.,16,3,776 (1971) 1971MBa A Merbach,J Bunzli; Helv.Chim.Acta,54,2536;2543 (1971) 1971RCd L Rygalov,A Chibisov; Zh.Anal.Khim.,26,5,850 (1971) 1971VZa V Vasilev,G Zaitseva,V Malakhova; Zh.Neorg.Khim.,16,675;2142(E:360;1144) (1971) 1970GFb R Guillaumont,J Franck et al; Radiochem.Radioanal.Lett.,4,73 (1970) 1970NEb G Neumann; Ark.Kemi.,32,229 (1970) 1970PLa G Popa,R Lereh,I Cazacu; An.Univ.Bucuresti,Chim.,19,9 (1970) 1970ZPa E Zhurennikov,D Pobezhimoskaya; Radiokhim.,12,1,105 (1970) 1969CKa A Chernyak,V Khomutnikov,A Batsuev et al; Zh.Neorg.Khim.,14,1251(E:655) (1969) 1969EMa S Elison,L Maltseva; Zh.Anal.Khim.,24,10,1524 (1969) 1969ESa J Erskine,M Sink,L Varga; Anal.Chem.,41,70 (1969) 1969KKf H Koch,H Kupsch; Z.Naturforsch.,24B,398 (1969) 1969KOb C Konecny; Z.Phys.Chem.,240,196;225 (1969) 1969MNc E Mazurenko,B Nabivanets; Zh.Neorg.Khim.,14,3286(E:1732) (1969) 1969PEc A Pilipenko,O Eremenko; Ukr.Khim.Zh.,35,681 (1969) 1969SPc B Spinner; Rev.Chim.Minerale,6,319 (1969) 1969SVd V Sochevanov,G Volkova; Zh.Neorg.Khim.,14,118 (1969) 1968ADa B Agarwala,A Dey; Chim.Anal.(Paris),50,233 (1968) 1968BMb A Babko,E Mazurenko,B Nabivanets; Zh.Neorg.Khim.,13,3,718 (1968) 1968LOb J Land,C Osborne; J.Less Common Metals,14,349 (1968) 1968LSc J Land,C Stillwell; J.Less Common Metals,14,231 (1968) 1968SSf V Startsev,Y Sannikov,S Stroganov et al; Zh.Neorg.Khim.,13,1608 (1968) 1967ADa B Agarwala,A Dey; Curr.Sci.,36,544 (1967) 1967ADc B Agarwala,A Dey; J.Indian Chem.Soc.,44,691 (1967) 1967BNd A Babko,B Nabivanets,V Lukachina; Zh.Neorg.Khim.,12,2965 (1967) 1967KOd C Kovecny; Z.Phys.Chem.,235,39 (1967) 1967LSb J Land,J Sanchez-Caldas; J.Less Common Metals,12,41 (1967) 1967NPb G Nickless,F Pollard,T Samuelson; Anal.Chim.Acta,39,37 (1967) 1967NSb A Nevzorov,O Songina; Zh.Neorg.Khim.,12,1259 (2388) (1967) 1967TTa N Turakhonova,S Talipov; Uzbeksk.Khim.Zh.,3,23 (1967) 1967VSd G Volkova,V Sochevanov; Zh.Neorg.Khim.,12,222 (433) (1967) 1966BNa A Babko,B Nabivanets,I Lukianets; Zh.Neorg.Khim.,11,1257 (1966) 1966GAc Y Goroshchenko,M Andreeva; Zh.Neorg.Khim.,11,2233 (1966) 1966SAb K Stolyarov,I Amantova; Vestnik Leningr.Univ.,4,141;155;10,133 (1966) 1965BSe B Budesinsky,B Savvin; Z.Anal.Chem.,214,189 (1965) 1965GBa R Gut,H Buser,E Schmid; Helv.Chim.Acta,48,878 (1965) 1965MHb R McCarley,B Hughes,F Cotton,R Zimmerman; Inorg.Chem.,4,1491 (1965) 1964GSc A Golub,A Sych; Zh.Neorg.Khim.,9,1085 (1964) 1964GUa R Gut; Helv.Chim.Acta,47,2262 (1964) 1964SHa L Sommer,J Havel; Collec.Czech.Chem.Commun.,29,690 (1964) 1962BVa A Babko,A Volkova; Zh.Neorg.Khim.,7,1216 (2345) (1962) 1957AHb N Adler,C Hiskey; J.Am.Chem.Soc.,79,1827,1831,1834 (1957) 1956SSc H Schafer,F Schulte; Zh.Anal.Khim.,149,73 (1956) 1954CVa D Cozzi,S Vivarelli; Z.Elektrochem.,58,177 (1954) 1952LAb W Latimer; "Oxidation Potentials",Prentice Hall,NY (1952) 1938GGa G Grube,H Grube; Z.Elektrochem.,44,771 (1938) 1928KHa S Kiehl,D Hart; J.Am.Chem.Soc.,50,2337 (1928) EXPLANATORY NOTES DATA Flags are :- T Data at other TEMPERATURES I Data with various BACKGROUNDS H Data for THERMOCHEMICAL quantities M Data for TERNARY Complexes ----------------------------------------------------------------------------- END Experiments recorded for Dr. M. Filella, University of Geneva from SC-Database on Saturday, 01 January, 2000 at 00:10:19