Tris(alkynyl)phosphines (RCC)3P as a source of functionalized phosphido and phosphinidene clusters: a complete triad of [M3(CO)9(µ3-η2-CCBut){µ2-P(CCBut)2}] complexes and the X-ray structure of a novel square-planar alkynylphosphinidene cluster [Ru4(CO)10(µ4-η4-ButCC-CCBut){µ4-P(CCBut)}]

Abstract

Polyunsaturated, alkynyl functionalized phosphide and phosphinidene clusters are readily accessible from tris(alkynyl)phosphines (RCC)₃P: a complete triad of isostructural clusters [M₃(CO)₉(µ₃-η²-CCBu^t){µ₂-P(CCBu^t)₂}](M = Fe, Ru, Os) and a novel square-planar alkynylphosphinidene cluster [Ru₄(CO)₁₀(µ₄-η⁴-Bu^tCC–CCBu^t){µ₄-P(CCBu^t)}] have been structurally characterized.