Abstract
Pincer complexes can act as efficient catalysts for many industrially important organic transformations under environmentally benign and mild conditions. The NNN pincer ligands have been prepared from the reactions between pyridine-2,6-dicarbonyldichloride and benzylamine or its derivatives in the presence of 4-dimethylaminopyridine (DMAP). Pd(II) complexes containing NNN pincer ligand and acetonitrile/triphenylphosphine have been synthesized and characterized by analytical, spectroscopic (FT-IR, UV-Visible, 1H, 13C &31P NMR and Mass) and single crystal X-ray diffraction techniques. Single crystal X-ray analysis reveals a distorted square planar geometry around Pd in all the complexes. These pincer complexes have been used as catalysts in Suzuki-Miyaura cross-coupling reaction. The effect of ancillary ligands (CH3CN and PPh3) in the complexes has been investigated towards the coupling reaction. The conversions have been determined from GC analyses. Scope of the system has been extended with various substituted halides.
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