850537-22-3Relevant academic research and scientific papers
Ylidyl-substituted phosphonio-benzophospholides as chelating ligands
Bajko, Zoltan,Gudat, Dietrich,Lissner, Falk,Nieger, Martin,Schleid, Thomas
, p. 1969 - 1976 (2004)
Phosphonio-benzo[c]phospholides with an additional phosphonium ylide substituent in 3-position were synthesized by deprotonation of appropriately substituted 1,3-bis-phosphonio benzophospholide cations and characterized by spectroscopic and analytical data. The ability of these molecules to act as bidentate P,C-chelating ligands to transition metal atoms was demonstrated in the reactions with [W(CO)4(norbornadiene)] and [MCl 2(cyclooctadiene)] (M = Pd, Pt). The PdII and Pt II complexes are distinguished by a strong inclination towards addition of H2O to the 10π-electron system of the ligand. The molecular structures of a W0 complex with a P,C-chelating ylidyl-phosphonio-benzophospholide ligand and of the product resulting from H2O-addition to a corresponding PtII complex were determined. The structural parameters of the W0 complex provide evidence for the presence of substantial steric strain around the metal atom.
