SYNTHESIS AND CHARACTERIZATION OF PALLADIUM(II) SCHIFF BASE COMPLEXES DERIVED FROM PHENYLAMINES AND THEIR CATALYTIC ACTIVITY FOR STILLE REACTION; [Sintesis dan Pencirian Palladium(II) Bes-Schiff Kompleks Dari Fenilamina dan Aktiviti Sebagai Pemangkin untuk Tindak Balas Stille]

• Published in: Malaysian Journal of Analytical Sciences
• Main Author: Muzammil N.N.; Ali M.T.M.; Tajuddin A.M.
• Format: Article
• Language: English
• Published: Malaysian Society of Analytical Sciences 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193013017&partnerID=40&md5=231869ec3f1b5aa0bb527a0cf384f667

Schiff bases with hydrogen and methyl at the para-position of phenylamines (B1H and B1Me) and their palladium(II) complexes, (PdB1H and PdB1Me) were synthesized and characterized by elemental analysis, FTIR,1 H and13C NMR, magnetic susceptibility measurement and UV-Visible spectroscopy. The shifting of the v(C=N) and v(C-O) bands to lower frequencies in FTIR indicated that the complexation to palladium(II) occurred through these moieties. All complexes are diamagnetic and displayed low molar conductivity in acetonitrile, indicating non-electrolytic behaviour. B1H and B1Me are structurally characterized using single crystal X-ray diffraction. B1H and B1Me crystallize in orthorhombic space group P212121, with a = 6.0879(2) Å, b = 9.1847(2) Å, and c = 21.0661(5) Å and a = 5.9051(9) Å, b = 9.2389(13) Å, and c = 23.297(3) Å, respectively. The palladium(II) complexes were screened for their catalytic activity in the Stille reaction. The reaction was monitored by measuring the % conversion of iodobenzene using GC-FID, where the reaction conditions used were 1.0 mmol% catalyst loading in the presence of triethylamine as the base and DMSO as the solvent at 80°C within 6 hours of the reaction time. It was observed that PdB1Me displayed the best catalytic performance for the Stille reaction, as indicated by the 80% conversion of iodobenzene. © 2024, Malaysian Society of Analytical Sciences. All rights reserved.