NiRu4(CO)9(µ-PPh2)2(µ4-CCPri)2: a pentanuclear mixed metal cluster with a novel metal framework

Abstract

The synthesis of a novel pentanuclear nickel–ruthenium cluster, [NiRu₄(CO)₉(µ-PPh₂)₂(µ₄-CCPrⁱ)₂], via the addition of an electron-rich species [(η-C₅H₅)Ni(CO)]₂ to a carbocationic µ₃-acetylide group in [Ru₃(CO)₉(µ₃-CCPrⁱ)(PPh₂)] is described; the X-ray structural analysis has shown that the metal framework consists of a ruthenium atom butterfly with the open edge bridged by a nickel atom, and the two acetylide ligands are co-ordinated in multi-site fashion to the metal cluster.