The crystal structure of the complex at 100 k

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Unformatted text preview: (4) – 2.120(3) Å indicating that the complex has a high-spin state at 100 K. Variable-temperature magnetic susceptibility data confirms that the complex is predominantly in the high -spin state at 100 K and undergoes a fairly abrupt high-spin to low-spin conversion with T½ at around 94 K. The Mössbauer data at 295 and 78 K confirm that the complex undergoes spin-crossover. The absorption spectrum of the complex in MeCN 5 5 at 298 K shows a weak absorption at 499 nm, assigned to T2g → Eg transition of an S = 2 Fe(II) ion in octahedral symmetry. 1 INO-O15 ANTIMICROBIAL INVESTIGATION OF SCHIFF BASES DERIVED FROM 2,6-DIAMINOPYRIDINE AND THEIR NOVEL METAL COMPLEXES MF Fatimatuzzahraa, B Hadariah and K Karimah 1 Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia E-mail: Three Schiff bases (L1:C19H15N3O2, L2:C19H21N3O7 and L3:C21H19N3O6) derived from 2,6-diaminopyridine with salicylaldehyde, 2,4-dihydroxybenzaldehyde and o-vanilin, respectively, were successfully synthesized and characterized. Six novel metal complexes of these ligands with Zn(II) and Cd(II) namely ZnL1, ZnL2, ZnL3, CdL1, CdL2 and CdL3 were obtained and the chemical structures were investigated by 1 means of elemental analysis, FTIR, H NMR spectroscopy, conductivity and magnetic susceptibility measurements. All the complexes were diamagnetic, displayed (C=N) bands in the range 1595.97 -1 1620.21 cm and non-electrolytic in solution. The inhibition ability on bacterial growth was investigated on two types of bacteria namely salmonella typhimurium (gram negative) and basillus subtilis (gram positive). 130 3rd ICYC 2010 Universiti Sains Malaysia INO-16 23rd-25th June 2010 SYNTHESIS AND BIOLOGICAL ACTIVITY STUDY OF NEW MANNICH AND SCHIFF BASE LIGANDS DERIVED FROM ISATIN AND 3-AMINO-1,2,4-TRIAZOLE AND THEIR METAL COMPLEXES A.J. Abdulghani and N.M. Alabidy University of Baghdad, College of Sciences, Department of Chemistry, Jaderya, Baghdad, Iraq E-mail: Two new Mannich and Schiff base ligan...
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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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