e-ISSN 2231-8542
ISSN 1511-3701
Hadariah Bahron, Siti Solihah Khaidir, Amalina Mohd Tajuddin and Syed Abdul Illah Alyahya Syed Abd Kadir
Pertanika Journal of Tropical Agricultural Science, Volume 25, Issue S, March 2017
Keywords: Schiff base, metal complexes, mononuclear, tetranuclear
Published on: 05 Dec 2017
A mononuclear and new tetranuclear metal complexes of Zn(II) with Schiff base ligands L1 and L2 respectively, were synthesised. L1 was obtained through the condensation of salicylaldehyde with Ortho-phenylenediamine while L2 was the product of reaction between of Ortho-vanillin with 2,4,6-trimethyl-m-phenylenediamine. The ligands and complexes were characterised via elemental analysis, melting point, IR and NMR spectroscopy. The shifting of v(C=N), v(C-OH) and v(O-CH3) infrared peaks upon coordination with Zn(II) indicated that these three moieties play a significant role in the complexation. It was found that L1 acted as tetradentate ligand, coordinating with Zn(II) centres through phenolic oxygen and imine nitrogen. The ligand L2 acted as a hexadentate ligand, bonded to metal via phenolic oxygen, imine nitrogen and methoxy oxygen, where four Zn(II) centres formed bridges to connect two ligands.
ISSN 1511-3701
e-ISSN 2231-8542