Anionic Pd(0) and Pd(II) Intermediates in Palladium-Catalyzed Heck and Cross-Coupling Reactions

The anions of PdCl2L2 and Pd(OAc)2, precursors of palladium(0) used in cross-coupling and Heck reactions, play a crucial role in these reactions. Tricoordinated anionic complexes Pd0L2Cl- and Pd0L2(OAc)- are the effective catalysts instead of the usually postulated Pd0L2 complex. The anion ligated t...

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Published inAccounts of chemical research Vol. 33; no. 5; pp. 314 - 321
Main Authors Amatore, Christian, Jutand, Anny
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 01.05.2000
Subjects
Anions - chemistry
Electrochemistry
Iodides - chemistry
Kinetics
Oxidation-Reduction
Palladium - chemistry
Styrenes - chemistry
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Summary:The anions of PdCl2L2 and Pd(OAc)2, precursors of palladium(0) used in cross-coupling and Heck reactions, play a crucial role in these reactions. Tricoordinated anionic complexes Pd0L2Cl- and Pd0L2(OAc)- are the effective catalysts instead of the usually postulated Pd0L2 complex. The anion ligated to the palladium(0) affects the kinetics of the oxidative addition to ArI as well as the structure and reactivity of the arylpalladium(II) complexes produced in this reaction. Thus, pentacoordinated anionic complexes are formed, ArPdI(Cl)L2 - or ArPdI(OAc)L2 -, the precursor of neutral trans-ArPd(OAc)L2, instead of the usually postulated trans-ArPdIL2 complex (L = PPh3).
Bibliography:ark:/67375/TPS-BMSNTNR2-W
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ObjectType-Article-1
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ISSN:0001-4842
1520-4898
DOI:10.1021/ar980063a