89741-89-9Relevant academic research and scientific papers
Transition Metal Complexes of Instable Ylides, III. Preparative, Stereochemical, and Mechanistic Aspects of the Stabilization of Instable Ylidic Chelate Ligands by Coordination to Chromium
Weber, Lothar,Wewers, Dietmar
, p. 1103 - 1112 (2007/10/02)
The sulfur ylide complex (CO)5Cr (1) reacts with unsymmetrically substituted diphosphanes and arsanes of the type R21E1CH2E2R22 (4a-d) to give regioselectively the chelate complexes 5a-d.In 5 the more nucleophilic end of 4 is transformed to the onium centre.On the other hand, (CO)4Cr2 (2) and 4a-d produce regioselectively the isomeric chelate complexes 6a-d, in which the more nucleophilic donor function of 4 is ligated to the chromium atom.
