Four dinuclear
N-heterocyclic carbene (NHC) palladium complexes were prepared by reaction of imidazolinium salts, PdCl
2 and bridging ligands (
piperazine and DABCO) in one pot or by direct cleavage of the chloro-bridged dimeric compounds [Pd(
μ-Cl)(Cl)(NHC)]
2 with bridging ligands. All of the complexes were fully characterized using
1H NMR,
13C NMR, high-resolution mass and infrared spectroscopies, elemental analysis and single-crystal X-ray diffraction. The catalytic activities of the obtained palladium catalysts towards
Hiyama coupling of aryl chlorides with
phenyltrimethoxysilane were investigated and the results s
howed that the dinuclear palladium complexes were considerably active for the
coupling reaction. Copyright