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Steric, Electronic, and Secondary Effects on the Coordination Chemistry of Ionic Phosphine Ligands and the Catalytic Behavior of Their Metal Complexes
Author(s) -
Snelders Dennis J. M.,
van Koten Gerard,
Klein Gebbink Robertus J. M.
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201002508
Subject(s) - steric effects , phosphine , chemistry , intramolecular force , supramolecular chemistry , coordination complex , ligand (biochemistry) , ionic bonding , catalysis , electronic effect , coordination sphere , metal , hydrogen bond , dissociation (chemistry) , stereochemistry , organic chemistry , molecule , ion , biochemistry , receptor
The effects of introducing ionic functionalities in phosphine ligands on the coordination chemistry of these ligands and the catalytic behavior of the corresponding metal complexes are reviewed. The steric and electronic consequences of such functionalizations are discussed. Apart from these steric and electronic effects, the presence of charged groups often leads to additional, supramolecular interactions that occur in the second coordination sphere of the metal complex, such as intramolecular, interligand hydrogen bonding and Coulombic repulsion. These interactions can significantly alter the behavior of the phosphine ligand in question. Such effects have been observed in phosphine–metal association/dissociation equilibria, ligand substitution reactions, and stereoisomerism in phosphine–metal complexes. By drawing general conclusions, this review offers an insight into the coordination and catalytic behavior of phosphine ligands containing ionic functionalities and their corresponding metal complexes.