Abstract
New palladium(II) phosphino complex, [Pd(PPh3)(L)](ClO4) (1) with thioether containing ONS donor Schiff base ligand (HL) is synthesized by the reaction of HL with sodium tetrachloropalladate (Na2PdCl4) and PPh3. The complex is thoroughly characterized by several spectroscopic techniques. The square planar geometry of the complex is confirmed by single crystal X-ray crystallography. Cyclic voltammetric study in acetonitrile exhibits ligand based irreversible oxidation and reduction peaks at +1.18 V and -1.25 V respectively versus Ag/AgCl reference electrode. Electronic structure and UV-vis spectrum of the complex are interpreted by DFT and TDDFT calculations. Catalytic property of the complex towards Suzuki-Miyaura cross coupling reactions is explored and excellent catalytic conversions (86-97%) are observed with various substituted aryl halides and phenylboronic acid at 100 °C.
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