Suzuki Aryl Coupling Catalysed by Palladium Bis(phosphane) Pincer Complexes Based on Ferrocene; X-ray Structure Determination of {PdCl[{2,5-(tBu2PCH2)2C5H2}Fe(C5H5)]}OTf

摘要

Palladium P,C,P pincer complexes PdCl[{2,5-(R2PCH2)2C5H2}Fe(C5H5)] (1, R = iPr; 2, R = tBu) and {PdCl[{2,5-(tBu2PCH2)2C5H2}Fe(C5H5)]}OTf (3) catalyse Suzuki aryl coupling under homogeneous conditions as well as in multiphase system (triphase system: organic/Aliquat 336/aqueous solvent); the X-ray structure of complex 3, in which the iron atom is oxidised, has been determined and compared with that of its neutral precursor 2.