The Malaysian Journal of Analytical Sciences Vol 16 No 1 (2012): 79 – 87

 

 

 

SYNTHESIS AND CHARACTERISATION OF PALLADIUM(II) SCHIFF BASE COMPLEXES AND  THEIR CATALYTIC ACTIVITIES FOR SUZUKI COUPLING REACTION

 

(Sintesis dan Pencirian Palladium(II) Bes-Schiff Kompleks dan Aktiviti Sebagai Pemangkin untuk Tindak Balas Suzuki)

 

Amalina Mohd Tajuddin¹, Hadariah Bahron^1*, Karimah Kassim¹, Wan Nazihah Wan Ibrahim¹

and Bohari M.Yamin² 

 

¹Faculty of Applied Sciences,

Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

²School of Chemical Sciences and Food Technology,

Faculty of Science & Technology,

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

 

*Corresponding author: hadariah@salam.uitm.edu.my

 

 

Abstract

The syntheses, physico-chemical and spectroscopic characterization of salicylaldimine-type Schiff-base ligands (Hapbam, HapFbam) and their novel mononuclear Pd(II) complexes (HapbamPd, HapFbamPd) are reported herein. The compounds were characterized by elemental analysis, FT-IR, ¹H NMR as well as magnetic susceptibility measurements. X-ray crystallography investigation of HapbamPd revealed that the Schiff bases behave as singly charged bidentate ligands, coordinating to the palladium centre in the ratio of ligand:metal of 2:1. The geometry of the palladium centre was a perfect square planar.  The catalytic potential of the Pd(II) complexes for Suzuki coupling reaction were investigated and monitored using GC. It was observed that both Pd(II) complexes displayed properties of good catalysts for the reaction, indicated by more than 90% conversion of the starting materials to the biphenyl product after 12 hours of reaction time at 100^oC in inert conditions.  The catalytic activity was compared with that of commercially available palladium(II) acetate.

 

Keywords:  Schiff base, Palladium(II), Suzuki reaction

 

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