Abstract

The reaction of the open pentanuclear cluster Ru₅(µ₅-C₂PPh₂)(µ-PPh₂)(CO)₁₃ (1) with dppm afforded the previously described complex Ru₅(µ₅-C₂PPh₂)(µ-PPh₂)(CO)₁₂(dppm) (2), with six Ru–Ru bonds and a chelating dppm ligand, together with Ru₅(µ₅-C₂PPh₂)(µ-dppm)(µ-PPh₂)(CO)₁₁ (3), whose structure is reported here (seven Ru–Ru bonds). The bidentate phosphine bridges an outer Ru–Ru vector, adjacent to that bridged by the PPh₂ group.