Abstract
1,2-Bis-[(5-methyl)-2-1H-benzimidazolyl]- (L1), 1,2-bis-[(5-chloro)-2-1H-benzimidazolyl]- (L2), 1,2-bis-[(5-nitro)-2-1H-benzimidazolyl]-1,2-ethanediol (L3) and their PdCl2 complexes were synthesized and characterized by elemental analysis, molar conductivity, i.r. and 1H-n.m.r. spectra. The benzene ring substituents lead to a decrease in melting point. The methyl group reduces the solubility and the acidity of L1 and Pd(L1)Cl2, whereas the Cl and NO2 groups increase the solubility and the acidity of L2, L3, Pd(L2)Cl2 and Pd(L3)Cl2. In Pd(L1)Cl2 and Pd(L2)Cl2 complexes, the ligands act as a bidentate through two nitrogen atoms. In Pd(L3)Cl2, ligand coordination occurs through one OH group oxygen atom and one of the benzimidazole nitrogen atoms.
Published Version
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