Synthesis and X-ray molecular structure of [Ru3(CO)6(µ2-C2But)(µ2–η2-C2But)(PPh2)2(Ph2PC2-But)]; a cluster containing symmetrical and unsymmetrical edge bridging alkynyl groups

Abstract

Oxidative cleavage of the phosphinoalkyne Ph₂PCCBu^t by Ru₃(CO)₁₂ gives good yields of a carbonyl cluster [Ru₃(CO)₆(µ₂-C₂Bu^t)(µ₂–η²-C₂Bu^t)(PPh₂)₂(Ph₂PC₂Bu^t)].(C₇H₈) which is shown by X-ray crystallography to contain both symmetrical (µ₂) and unsymmetrical (µ₂–η²) edge bridging –CCBu^t groups.