90526-23-1Relevant academic research and scientific papers
Transition Metal Complexes of Instable Ylides, II. Stabilization of Phosphino- and Arsinomethyl-substituted Phosphonium- and Arsonium Ylides by Coordination to Tetracarbonylchromium
Weber, Lothar,Wewers, Dietmar,Meyer, Wolfgang,Boese, Roland
, p. 732 - 742 (2007/10/02)
The sulfur ylide complexes (CO)5Cr (1) and (CO)4Cr2 (7) react with symmetrically substituted ditertiary phosphanes or arsanes such as 5 to yield five-membered metallacycles (6), in which the ylides CH2=ER21-CR22-ER21 (E = P, As) are incorporated as chelate ligands.The free ylidic ligands are not stable.The structures of 6 are elucidated by means of IR, 1H and 31P NMR spectroscopy as well as by an X-ray structure analysis of 6f.
