Formation of the first heterobimetallic phosphido-bridged σ–π-acetylide complex [(C5H5)2Ti(µ–σ,η2-CCPh)(µ-PPh2)Ni(PPh3)] by cleavage of the central C–C single bond in PhCC–CCSiMe3 and of the P–C bond in Ph3P, and coupling of the fragments to PhCCSiMe3

Abstract

An unexpected activation of the central C–C single bond of PhCC–CCSiMe₃ and of one P–C bond in Ph₃P and coupling of the fragments to PhCCSiMe₃ was observed in the reaction of [Ni(PPh₃)₂(η²-PhCC–CCSiMe₃)] with ‘(C₅H₅)₂’ providing, via the tweezer-like titanocene nickel(0) triphenylphosphine bisacetylide complex [(C₅H₅)₂Ti(µ–σ, η²-CCSiMe₃)(CCPh)Ni(PPh₃)]1, the phosphido-bridged σ–π-acetylide complex [(C₅H₅)₂ Ti(µ–σ, η²-CCPh)(µ-PPh₂)Ni(PPh₃)]2.