Oxidative addition of Ph3PCHCHO at a triosmium cluster with cleavage of C–;H bonds: crystal structures of two isomers containing the new ligands Ph3PCCHO and Ph3PCHCO, respectively

Abstract

Rapid oxidative addition of Ph₃PCHCHO at [Os₃(CO)₁₀(MeCN)₂] gives the isomers [Os₃H(µ-Ph₃PCCHO)(CO)₁₀](1) and [Os₃H(µ-Ph₃PCHCO)(CO)₁₀](2)(X-ray structures reported) which decarbonylate to give the clusters containing triply-bridging ligands: [Os₃H(Ph₃PCCHO)(CO)₉](3), [Os₃H₂(C₆H₄PPh₂CCHO)(CO)₈](5), and [Os₃H(Ph₃PCHCO)(CO)₉](4)(as two isomers).