(kappa(2)-P,S)Pt(benzyl) complexes derived from 1/3-P(i)Pr(2)-2-S(t)Bu-indene: facile synthesis of carbanion- and borate-containing zwitterions

The versatile new ligand precursor 1/3-P(i)Pr(2)-2-S(t)Bu-indene has been employed in the preparation of neutral and cationic (kappa(2)-P,S)Pt(benzyl) complexes, as well as structurally related zwitterions in which the formally cationic metal fragment is counterbalanced by an uncoordinated indenide or borate fragment that is contained within the ancillary ligand backbone.