Abstract
Three new complexes, [CoIIL2(bzln)2] (1), [NiIIL2(DMF)2] (2), and [ZnIIL2] (3), with the bidentate (NO) Schiff base HL = 2-((E)-(benzylimino)methyl)-4-nitrophenol have been synthesized and characterized. [CoIIL2(bzln)2] (1) was initially formed from the reaction of H2L1 (N,N′-bis(5-nitrobenzaldehyde)-2-aminobenzylamine = H2L1), with CoII(CH3COO)2·4H2O in the presence of benzylamine. The X-ray crystal structure of 1 revealed that HL was formed from the hydrolysis of H2L1 and the recondensation of benzylamine with 2-hydroxy-5-nitrobenzaldehyde produced in H2L1 hydrolysis. The Schiff base HL was then prepared by direct reaction of 2-hydroxy-5-nitrobenzaldehyde and benzylamine. Complexes 1–3 were also directly synthesized and their crystal and molecular structures determined by X-ray crystallography. The ligand and its metal complexes were also screened for in vitro antibacterial activity.
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Acknowledgments
Partial support of this work by the Isfahan University of Technology Research Council is gratefully acknowledged. The X-ray center of the Vienna University of Technology is acknowledged for providing access to the single-crystal diffractometer.