A Bimetallic Complex Spanned by the C₄H Ligand: Synthesis of [Cl(CO)₂L₂RuC⋮CCHCRuL₂(η-C₅H₅)]PF₆ (L = PPh₃)

Abstract

The synthesis of the first example of a bimetallic complex spanned by the C4H alkynylvinylidene ligand, [Cl(CO)2L2RuC⋮CCHCRuL2(η-C5H5)]PF6 (L = PPh3), is reported: the reaction of [Ru(CO)2L3] with butadiyne provides [RuH(C⋮CC⋮CH)(CO)2L2], which is converted to the chloro derivative [RuCl(C⋮CC⋮CH)(CO)2L2] by N-chlorosuccinimide. Subsequent treatment with [Ru(thf)L2(η-C5H5)]PF6 provides [Cl(CO)2L2RuC⋮CCHCRuL2(η-C5H5)]PF6, deprotonation of which affords [Cl(CO)2L2RuC⋮CC⋮CRuL2(η-C5H5)].