Carbon Monoxide Promoted Reductive Elimination of Hydrogen from Tp‘ Platinum Complexes

Acid-assisted reductive elimination of hydrogen from Tp‘PtH3 and of methane and hydrogen from Tp‘PtMeH2 (Tp‘ = hydridotris(3,5-dimethylpyrazolyl)borate) is examined herein. Loss of H2 is observed from solutions containing platinum(IV) complexes of the type Tp‘Pt(R)(H)2 (R = Me, H) upon protonation and addition of a ligand such as CO. Results of kinetic studies on reductive elimination of H2 and formation of [κ2-(HTp‘)Pt(R)(L)][BAr‘4] products from intermediates derived from Tp‘Pt(R)(H)2 precursors are described. Elimination appears to occur from cationic 6-coordinate [κ2-(HTp‘)Pt(R)(H)2(L)][BAr‘4] species.