Zwitterionic complexes supported by an anionic bis(phosphino)borate ligand: Bond activation studies and novel transformations

Abstract

The anionic, bidentate phosphine ligand [Ph_2B(CH_2PPh_2)_2], ([Ph_2BP_2]), and functionalized derivatives of these bis(phosphino)borates have been employed as auxiliary ligands in the preparation of complexes of platinum and copper, whose reaction chemistry has been examined. For example, the neutral complex (Ph_2BP_2)Pt(Me)(THF) gives rise to several examples of E-H bond activation chemistry (E=C, Si, H, B). Moreover, copper derivatives supported by functionalized bis(phosphino)borate ligands appear to be promising candidates for group transfer reactions. Our efforts to elucidate the bond activation and/or atom and group transfer processes of these zwitterionic complexes will be discussed.

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