Journal
JOURNAL OF COORDINATION CHEMISTRY
Volume 65, Issue 5, Pages 763-779Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2012.661048
Keywords
Benzimidazole; Hydrogen bonding; TD-DFT; NBO; Cytotoxicity
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[MLCl2] center dot zH(2)O center dot C2H5OH (L = 2-[(1H-benzimidazol-2-ylmethyl)-amino]-benzoic acid methyl ester; M = Pd, z = 2; M = Pt, z = 0) complexes were synthesized as potential antitumor compounds and their structures were elucidated by elemental analysis and spectroscopic data. Theoretical molecular structures were investigated by the DFT/B3LYP method using the LANL2DZ basis set. The calculated molecular parameters, bond distances, and angles, revealed a square-planar geometry around the metal through pyridine-type nitrogen (N-py) of benzimidazole and the secondary amino group (NHsec). The lone pair interaction LP(2)O48 of ethanol with anti-bonding sigma*(C(16)-H(29)) is an evidence for charge transfer from ethanol to platinum. The electronic movement and assignment of electronic spectra were carried out by TD-DFT calculations. The ligand in comparison to its metal complexes was screened for antibacterial activity and cytotoxicity.
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