Synthesis and structural characterization of gallium and indium complexes obtained from redistribution reactions of mixed chalcogen-imidodiphosphinate ligands

The ionic complex [Ga{N(SPiPr2)(SePiPr2)-S, Se}2]+[GaCl4]− (5) was prepared by a ligand redistribution process from the mono-chelate [Cl2Ga{N(SPiPr2)(SePiPr2)-S, Se}] (3) complex in benzene. A similar phenomenon was observed for the heavier indium homologues, where the neutral complexes [ClIn{N(SPiPr2)(SePiPr2)-S, Se}2] (7) and [ClIn{N(OPiPr2)(SPiPr2)-O, S}2] (8) were isolated along with InCl3 as the main reaction by-product. Complexes 5, 7 and 8 were characterized by single-crystal X-ray structural analysis.