Journal
TRANSITION METAL CHEMISTRY
Volume 35, Issue 6, Pages 649-658Publisher
SPRINGER
DOI: 10.1007/s11243-010-9376-8
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- UGC
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A series of binuclear Co(II), Ni(II), Cu(II) and Zn(II) complexes having mu-1,2 diazine bridging have been prepared and characterized by various physico-chemical methods. The hexadentate ligands were synthesized by condensing 3,5-dichloroformyl-1H-pyrazole with 2-hydrazinobenzothiazole (L(1)H) or 4-aminoantipyrine (L(2)H) in 1:2 ratio. Gel electrophoresis data indicate cleavage of E. coli DNA to a minute extent by both [Co(2)L(2)(mu-Cl)Cl(2)(H(2)O)(2)]center dot H(2)O and [Ni(2)L(2)(mu-Cl)Cl(2)(H(2)O)(2)]. Conversely, the data for the remaining complexes indicated binding but not cleavage. These results were confirmed by viscosity measurements and absorption spectral studies. An intercalative binding mode is predicted when the title complexes interact with DNA.
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