期刊
POLYHEDRON
卷 29, 期 2, 页码 864-870出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2009.10.011
关键词
Imidazole; Semicarbazone; Zinc; Copper; Nickel; Cobalt; Antimicrobial activity
资金
- Universidade de Vigo (Spain)
Some first row transition metal(II) complexes of imidazole-2-carbaldehyde semicarbazone (H2L) have been synthesised and characterised. Single crystal X-ray diffraction studies have revealed the molecular structure of the neutral complex NiCl2(H2L)(H2O). This latter complex shows a pseudo-octahedral geometry, with both chloride ions displaying a cis disposition. The asymmetry of this complex allows the formation of two enantiomers in the racemic crystal structure. The non-deprotonated semicarbazone ligand behaves as an N,N,O-donor, through the imidazole and imine N atoms and the O-keto atom. The coordinative behaviour of H2L in CuCl2(H2L)(H2O), ZnCl2(H2L)(2)center dot 0.5EtOH and CoCl2(H2L)center dot 0.5H(2)O is reported as only N,O-donor. The antimicrobial activity of the semicarbazone ligand and its metal complexes has been tested against some representative bacteria and fungi. A moderate inhibitory activity of the cobalt complex was detected towards the assayed phytopathogenic fungi Alternaria tenuis and Sclerotinia minor (MIC 50 mu g/mL). (c) 2009 Elsevier Ltd. All rights reserved.
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