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Ylidyl‐substituted Phosphonio‐benzophospholides as Chelating Ligands
Author(s) -
Bajko Zoltan,
Gudat Dietrich,
Lissner Falk,
Nieger Martin,
Schleid Thomas
Publication year - 2004
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400217
Subject(s) - chemistry , denticity , chelation , deprotonation , ylide , norbornadiene , substituent , ligand (biochemistry) , stereochemistry , steric effects , metal , phosphonium , transition metal , bite angle , medicinal chemistry , crystallography , crystal structure , inorganic chemistry , polymer chemistry , ion , organic chemistry , biochemistry , receptor , catalysis
Abstract 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 Pd II and Pt II complexes are distinguished by a strong inclination towards addition of H 2 O to the 10π‐electron system of the ligand. The molecular structures of a W 0 complex with a P, C‐chelating ylidyl‐phosphonio‐benzophospholide ligand and of the product resulting from H 2 O‐addition to a corresponding Pt II complex were determined. The structural parameters of the W 0 complex provide evidence for the presence of substantial steric strain around the metal atom.