A novel bidentate bonding mode for a triarylphosphine ligand: the synthesis and X-ray structure analysis of the mixed-metal cluster compound [Cu2Ru4(µ3-H)2(CO)12{µ-P(CH2Ph)2(η2-CH2Ph)}]

Abstract

Hydrogen-1 n.m.r. data and X-ray structure analysis show that treatment of [N(PPh₃)₂]₂[Ru₄H₂(CO)₁₂] with [Cu(NCMe)₄]PF₆ at –30 °C, followed by addition of two equivalents of P(CH₂Ph)₃ gives a novel cluster compound [Cu₂Ru₄(µ₃-H)₂(CO)₁₂{P(CH₂Ph)₃}] in which the phosphine ligand bridges two copper atoms of the capped trigonal bipyramidal metal framework via bonds from the phosphorus atom and an η²-(CH₂Ph) ring.