title: A mechanistic study into the interconversion of rhodium alkyne, alkynyl hydride and vinylidene complexes.
abstract: The conversion of the alkyne complex RhCl(PPr(i)3)2(eta2-PhC[triple bond]CH) into its vinylidene isomer RhCl(PPr(i)3)2(=C=CPhH) has been monitored via NMR spectroscopy in a range of solvents. In THF and hexane solution the reaction was observed to proceed via the alkynyl hydride complex Rh(H)Cl(PPr(i)3)2(-C[triple bond]CPh). The kinetic profile of the reaction demonstrates that this species is an intermediate in the formation of the vinylidene complex.
authors.affiliation: Department of Chemistry, Univeristy of York, Heslington, York, UK.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Cowley
authors.forename: Jason M
authors.initials: JM
authors.lastname: Lynam
authors.forename: John M
authors.initials: JM
authors.lastname: Slattery