Reaction of acyl(hydrido)cobalt(III) complexes with (2-diphenylphosphanyl)thiophenol and the influence of chelating ligands containing hard/soft donor atoms on the stability of cobalt complexes
摘要:
The reaction of acyl(hydrido)cobalt(III) complexes Co-III (O boolean AND C=O)(H)(PMe3)(3) (1-5) with (2-diphenylphosphanyl)thiophenol afforded four types of complexes Co-III (O boolean AND C=O)(P boolean AND S)(PMe3)(2) (6-7), Co-III (O boolean AND C=O)(O boolean AND OHC)(2) (11-15), Co-III (P boolean AND S)(PMe3)(3) (16), and Co-II (P boolean AND S-2)(PMe3) (17). A mechanism for the formation of these complexes is proposed. The influences of chelating ligands containing hard/soft donor atoms on the stability of the cobalt complexes in different oxidation states are discussed with respect to the HSAB concept. (c) 2007 Elsevier Ltd. All rights reserved.