Synthesis, Characterization and Catalytic Study of a Novel Binuclear Paddle-wheel Palladium(II) Complex in the Mizoroki-Heck Reaction

Document Type: Research Paper

Authors

1 Department of Chemistry, Farhangian University, Tehran, Iran

2 Young Researchers and Elite Club, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran

3 Cellular and Molecular Research Center, Research Institute for Cellular and Molecular Medicine, Urmia University of Medical Sciences, Urmia, Iran

4 Payame Noor University, Department of Chemistry, 19395-4697 Tehran, Iran

5 Department of Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran

10.22036/icr.2019.200120.1053

Abstract

A new binuclear paddle-wheel palladium(II) complex of [Pd2(μ-mtzt)4]dmgH2 (1) has been prepared by the treatment of PdCl2 in acetonitrile with mixture of 1-methyl-1H-1,2,3,4-tetrazole-5-thiol (Hmtzt) and dimethylglyoxime (dmgH2) in methanol. Resulted complex was characterized by elemental analysis (CHNS), IR, UV–Vis absorption, 1H NMR spectroscopy and its structure was determined with single-crystal X-ray diffraction. Single crystal analysis reveals that this complex has binuclear structure in a paddle-wheel fashion with Pd-Pd distances of 2.808(2)Å. Also, in this binuclear complex, each palladium(II) ion has a slightly distorted square-pyramidal coordination geometry with the two nitrogen and two sulfur atoms in equatorial positions from four bridges mtzt- ligands and the second palladium subunit in axial position. Catalytic potentiality of complex 1 is also exhibited in the Mizoroki–Heck coupling reactions between a range of aryl halides and olefins. The catalyst shows very much efficient reactivity in the Mizoroki–Heck reactions giving high yield of the coupling products.

Keywords



Articles in Press, Accepted Manuscript
Available Online from 21 September 2019
  • Receive Date: 01 September 2019
  • Revise Date: 03 September 2019
  • Accept Date: 04 September 2019