Reactions of {Ru3(m-PPh2)(CO)9 }2(m3:m3-C4) with H+/H- or H2 to Yield Penta- and Hexa-Nuclear Cluster Compounds

Abstract

Addition of K[BHBu^s₃] to {Ru₃(µ-PPh₂)(CO)₉}₂(µ₃:µ₃-C₄) (1), followed by acidification, is proposed to give {Ru₃H(µ-PPh₂)(CO)₉}₂(µ₃:µ₃-C=CHCH=C) (2), in which hydrogen atoms have added to each cluster unit and to the C4 fragment of (1) to give a bis(vinylidene) ligand. The osmium analogue has also been prepared. In contrast, the reaction with dihydrogen results in the pentanuclear complex Ru₃{µ₃:µ-C₂C₂[Ru₂(µ-PPh₂)(CO)₆]}(µ- PPh₂)(CO)₉ (3), by cleavage of an Ru(CO)₃ fragment from (1).