Alkyne-to-Vinylidene Transformation on <i>trans</i>-(Cl)Rh(phosphine)<sub>2</sub>: Acceleration by a Heterocyclic Ligand and Absence of Bimolecular Mechanism
作者:Douglas B. Grotjahn、Xi Zeng、Andrew L. Cooksy
DOI:10.1021/ja058736p
日期:2006.3.1
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.