title: Alkyne-to-vinylidene transformation on trans-(Cl)Rh(phosphine)2: acceleration by a heterocyclic ligand and absence of bimolecular mechanism.
abstract: Alkyne-to-vinylidene transformation on square-planar trans-(Cl)Rh(phosphine)2 has been proposed to proceed by a mechanism with a key step being bimolecular transfer of hydridic H to an alkynyl carbon. Labeling studies reported here are inconsistent with this pathway. In addition, an imidazolyl substituent accelerates the transformation.
authors.affiliation: Department of Chemistry and Biochemistry, 5500 Campanile Drive, San Diego State University, San Diego, CA 92182-1030, USA. grotjahn@chemistry.sdsu.edu
authors.forename: Douglas B
authors.initials: DB
authors.lastname: Grotjahn
authors.forename: Xi
authors.initials: X
authors.lastname: Zeng
authors.forename: Andrew L
authors.initials: AL
authors.lastname: Cooksy