Cyclopentadienyl-ruthenium and -osmium Chemistry. XXXV. Some Ethynyl, Vinylidene and Related Complexes

Abstract

The syntheses of several vinylidene - and ethynyl -ruthenium complexes are described, starting from HC₂SiMe₃ and RuCl (L)₂(η-C₅H₅)(L= PPh₃, PMe₃; L₂ = dppe ). Their properties and some reactions are reported. The metallacyclic complex [ Ru {C₄H₂(SiMe₃)₂}(PMe₃)(η-C₅H₅)][PF₆] has also been isolated. The unsubstituted complexes are very reactive; for example, MeOH adds rapidly to the vinylidene to form the C(OMe)Me derivative.