The isomers have distinctly different physical

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Unformatted text preview: es, which agrees with the TGA result. The UV-vis spectroscopy shows a symmetrical broad d-d band at 550 nm (1) and 556 nm (2), suggesting a strongly coordinated square planar geometry at Cu(II). Cyclic voltammetry in the range -1.5 to +1.5V indicates that 1 is not reduced to Cu(I), but instead undergoes two irreversible oxidation processes at +0.63V and +0.93V. Under the same conditions, 2 is neither reduced nor oxidized. INO-P8 SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF ZINC(II) AND COPPER(II) METAL COMPLEXES OF SOME BENZOYL HYDRAZONE DERIVATIVES S Siti Munirah and M A Hapipah Chemistry Department, University of Malaya, 50603 Kuala Lumpur, Malaysia E-mail: chemical.bonding@gmail.com Schiff base ligands can be coordinated with many different metals and stable in various states of oxidation. Over the years, attention has been given to the chemistry of metal complexes of Schiff ba ses containing nitrogen and other donors may be due to their stability and biological activities. In this study, a series of Schiff base ligands were prepared by reacting 3,5 -dihyroxybenzohydrazide with substituted salicylaldehyde and 2-hydroxyacetophenone. The zinc and copper complexes were subsequently prepared by reacting the ligands with metal acetate or dichloride in 2:1 molar ratio. All ligands, and complexes were characterized using IR, NMR, UV spectroscopy, and TGA while the X -ray structures of some compounds have been determined using single crystal X-ray diffractometry. 136 3rd ICYC 2010 Universiti Sains Malaysia INO-P9 23rd-25th June 2010 SYNTHESIS, REACTIONS AND STRUCTURAL STUDIES OF SOME TRIORGANOTIN CARBOXYLATE WITH BIOLOGICAL ACTIVITIES Thong Pui Yee and Lo Kong Mun Chemistry Department, University of Malaya, 50603 Kuala Lumpur, Malaysia E-mail: elainetpy@gmail.com The synthesis of triorganotin carboxylates with the general formula of R 3SnOCOCH=CHC6H5-Z-p where R= Bu, Cyh, Bz; Z = -H, -CH3, -OCH3, -NO2, -Cl were synthesized. These organotin carboxylates were then reacted with brominating agents such as bromine, 4,4-dimethylaminopyridinium tribromide and Nbromosuccinimide. In general the bromination led to the cleavage of the Sn -O bond and the addition of bromide s...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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