Issue 43, 2019

The diverse mechanisms for the oxidative addition of C–Br bonds to Pd(PR3) and Pd(PR3)2 complexes

Abstract

The reaction between bromobenzene and palladium(0) complexes leading to a palladium(II) complex containing bromide and phenyl ligands is studied computationally with DFT methods. Three different mechanisms are considered: concerted, nucleophilic substitution and radical. A systematic analysis is carried out on the effect on each of these mechanisms of a number of variables: the identity of the phosphine (PF3, PH3, PMe3 or PPh3), the nature of the solvent (vacuum, tetrahydrofuran, dimethylformamide or water) and the number of phosphine ligands (mono- or bis-phosphine). The concerted and nucleophilic substitution mechanisms are competitive in many cases, the identity of the preferred one depending on a combination of factors. Additional calculations with bromomethane, bromoethylene and bromoethane are carried out in selected cases for further clarification.

Graphical abstract: The diverse mechanisms for the oxidative addition of C–Br bonds to Pd(PR3) and Pd(PR3)2 complexes

Supplementary files

Article information

Article type
Paper
Submitted
02 ဩ 2019
Accepted
03 အောက် 2019
First published
03 အောက် 2019

Dalton Trans., 2019,48, 16242-16248

The diverse mechanisms for the oxidative addition of C–Br bonds to Pd(PR3) and Pd(PR3)2 complexes

M. Besora and F. Maseras, Dalton Trans., 2019, 48, 16242 DOI: 10.1039/C9DT03155C

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