Journal
COORDINATION CHEMISTRY REVIEWS
Volume 257, Issue 2, Pages 299-314Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ccr.2012.04.030
Keywords
Mononuclear Pd(III) complexes; Dinuclear Pd(III) complexes; Pd catalysis; EPR; Chemical oxidation; Electrolysis
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Funding
- Department of Chemistry at Washington University
- American Chemical Society Petroleum Research Fund [49914-DNI3]
- DOE Catalysis Science Program [DE-FG02-11ER16254]
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Despite the rich chemistry of palladium in oxidation states of 0, +2, and +4, no Pd-III coordination compounds have been reported until the 1980s. Moreover, while Pd complexes are among the most commonly used catalysts in organometallic chemistry, the first organometallic Pd-III complexes have only been reported in 2006. Since then, a significant number of Pd-III complexes have been isolated, characterized, and proposed as active catalytic intermediates in the functionalization of C-H bonds, oxidatively induced C-C bond formation reactions, as well as radical insertion and addition reactions. This review provides an overview of the synthesis and spectroscopic characterization of mononuclear and dinuclear Pd-III complexes. A detailed understanding of the steric and electronic properties of Pd-III complexes should provide insight for the development of novel catalysts for multi-electron redox reactions and various organometallic transformations. (C) 2012 Elsevier B.V. All rights reserved.
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