132. Chiral anion-based NMR enantiodiscrimination of a dinuclear, cationic Ir(I) NHC complex with a figure-of-eight loop structure
     Xianghao Liu, Jérôme Lacour, Pierre Braunstein
     Dalton Trans. 2012, 41, 138-142

A dinuclear Ir(I) complex with a bis-NHC ligand was formed in situ from 1,1’-((4,6-dimethyl-1,3-phenylene)bis(methylene))bis(3-methyl-1H-imidazol-3-ium) in the presence of Cs₂CO₃ and [Ir(μ-Cl)(cod)]₂. Its solid-state structure, determined by X-ray diffraction, shows a figure-of-eight loop with both the P and M enantiomers being present. Solution NMR studies were performed to examine the enantiodiscrimination between them by applying the enantiopure anions tris(tetrachlorobenzenediolato)phosphate(V) (Δ-TRISPHAT) and bis(tetrachlorobenzenediolato)mono([1,10]binaphthalenyl-2,20-diolato)phosphate(V) (Λ-BINPHAT).

DOI : 10.1039/C1DT11604E 

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