Reaction of alkynes with cluster-bound dicarbon (C2); X-ray structures of [Ru5(µ5-CCCPhCR)(µ-SMe)2(µ-PPh2)2(CO)10](R = H, Ph)

Abstract

Addition of PhCCR (R = H, Ph)to [Ru₅(µ₅-C₂)(µ-SMe)₂(µ-PPh₂)₂-(CO)₁₀] 1 results in the formation of [Ru₅(µ₅-CCCPhCR)(µ-SMe)₂(µ-PPh₂)₂-(CO)₁₀](R = H 2, Ph 3), the µ₅-CCCPhCR ligand being formed by coupling of the alkyne with the C₂ ligand of 1; in 2 the pentagonal Ru₅ cluster of 1 is retained while 3 an extra Ru–Ru bond is formed, yielding an envelope-type structure; corresponding differences in the attachment of the organic ligand to the Ru₅ cluster are found.