All the ligands and complexes p repared have been 1

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Unformatted text preview: orm with the phenol H atom transferred to the imine group. Adjacent zwitterions are linked into a linear chain running along the axis by an indole–hydroxy N—H- - -O hydrogen bond. For the complex Bis{4 – chloro – 2 - [2 - (1H-indol-3-yl) ethyliminomethyl] phenolato k2N,O} zinc(II) (TCS)2Zn, the zinc atom is N,Ochelated by two deprotonated Schiff base monoanionic ligands in a tetrahedral coordination geometry. The Zn atom lies on a special position of site symmetry 2. In the case of nickel complex Bis{2 -[2-(1Hindol-3-yl)ethyliminomethyl] phenolato k2N,O} nickel(II) N,N-dimethylformamide disolvate the nickel atom lies on a twofold rotation axis. It is N,O-chelated by the deprotonated Schiff base 2-[2-(1H-indol-3yl)ethyliminomethyl]phenolate ligand in a square-planar coordination environment. The molecule is linked to a solvent molecule by an indole–dimethylformamide NH- - -O hydrogen bond. Anti-ulcerogenic activities of the ligands and complexes have been investigated with Cimetidine as a standard drug. The screening was done on high and low doses (60 mg/kg and 30 mg/kg) respectively on six albino SpragueDawley rats which subjected to ulcer induction by absolute ethanol after dosing. The ulcer lesion of the stomachs were identified and counted, and then correlation between the different compound effects has been made. (TS)2Zn complex proved to be more effective in ulcer inh ibition than it's nickel and copper congeners. INO-O2 THERMAL STABILITY STUDY ON PHENOXO IRON(III) COMPLEXES Ramadan Ali Bawa Department of Chemistry, Faculty of Science, University of 7 October, Misurata, Libya, P O Box 875 E-mail: ramadanali70@yahoo.com Thermogravimeteric study using TG/DTA technique was carried out on a number of phenoxo iron(III) complexes. Although the complexes were stable at ambient temperature, they were found to be unstable upon heating. The heating was started from room temperature to 600 °C. th 123 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia INO-O3 SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITIES OF ORGANOTIN(...
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