Synthesis, reactivity, and molecular structure of the raft complex [Os6(µ3-O)(µ3-CO)(CO)18]

Abstract

The cluster [Os₆(CO)₂₀] reacts with molecular oxygen to give [Os₆(µ₃-O)(µ₃-CO)(CO)₁₈], which has been shown by an X-ray analysis to contain an Os₆ raft, the central triangle of which is capped on one side by an O atom and on the other by a carbonyl group; this oxygenated cluster reacts with P(Ome)₃ to yield the clusters [Os₆(CO)_21–n{P(OMe)₃}_n](n= 1–6) and the cluster [Os₆(CO)₂₀] also reacts with acetylene to give [Os₄(CO)₁₂(C₂H₂)] and [Os₅(CO)₁₃(C₂H₂)₂] and with hydrogen sulphide to give [H₂Os₃(CO)₉S].