Interference by Phosphine Decomposition in Oxidative Additions of Aryl Halides to Methyl-, and Trimethylsilyl-tris(triphenylphosphine)Cobalt

Article abstract of DOI:10.1016/0022-328X(86)80416-8

The oxidative addition of aryl halides, ArX, to 3CoCH3 yield ArAr and ArCH3 when Ar= 4-CH3C6H4, but exclusively ArCH3 for 1- and 2-bromo-naphthalene and 4-bromobiphenyl.Decomposition of the phosphine ligand in 3CoCH3 interfers with these reactions to varying extents depending on the relative rates of the reactions; ArCl mostly gives PhPh with some ArPh and ArAr; ArI gives mostly ArAr; ArBr shows intermediate behaviour.Other cobalt compounds such as 3CoSi3, 3CoCH3, 3CoPh and 3CoCH3 and several other organic halides examined show a low activity in the oxidative addition.