Synthesis, characterization and biological activities of 3-methylbenzyl 2-(6-methyl pyridin-2-ylmethylene)hydrazine carbodithioate and its transition metal complexes
Begum, Thahira and Crouse, Karen Anne and Mohamed Tahir, Mohamed Ibrahim and How, Fiona Ni Foong and Rosli, Rozita and Watkin, David J. (2010) Synthesis, characterization and biological activities of 3-methylbenzyl 2-(6-methyl pyridin-2-ylmethylene)hydrazine carbodithioate and its transition metal complexes. Transition Metal Chemistry, 35 (August). pp. 871-876. ISSN 0340-4285
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A tridentate nitrogen-sulfur Schiff base,3-methylbenzyl 2-(6-methylpyridin-2-ylmethylene)hydrazine carbodithioate (6mpyS3M), was synthesized by condensation of 6 methylpyridine-2-aldehyde with S-3 methylbenzyldithiocarbazate.It crystallized in space group P 21/n. It displayed intermolecular N–HN hydrogen bonding between the a-nitrogen and the pyridyl nitrogen. The thione sulfur is in a trans position with respect to the 6-methylpyridine fragment across the C–N bond but adopts a cis position with the 3-methylbenzyl fragment through the C–S bond. Octahedral complexes containing two 6mpyS3M ligands were prepared with Cu(II), Ni(II), Zn(II) and Cd(II).6mpyS3M and its metal complexes were assayed against selected microbes and two breast cancer cell lines. 6mpyS3M was strongly active against both cancer cell lines. Its metal complexes showed high selectivity with Cu(II), Ni(II) and Zn(II) complexes strongly active against only one of the cancer cell lines, whereas the Cd(II) complex was strongly active only against the other. Only Cu(II) and Cd(II) complexes were active against some of the bacteria.
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