Affiliation:
1. Department of Studies in Chemistry, Bangalore University, Central College Campus, Bangalore 560 001, India
Abstract
The reactions of hydrated halides and perchlorate of divalent zinc with 1- o-hydroxybenzyl-2- o-hydroxyphenylbenzimidazole (L1), 1- m-hydroxybenzyl-2- m-hydroxyphenylbenzimidazole (L2),1- p-hydroxybenzyl-2- p-hydroxyphenylbenzimidazole (L3) and 1- o-chlorobenzyl-2- o-chlorophenylbenzimidazole (L4) ligands in 1:2 and 1:3 molar ratios in absolute ethanol/acetone at refluxing temperature produced white/pale yellow complexes of the formula ZnX2L n. yH2O [L = L1, X = Cl, n = 2, y = 1; X = Br, n = 2, y = 0; X = I, n = 3, y = 1; X = ClO4, n = 2, y = 0; L = L2, X = Cl, Br, n = 2, y = 1, X = ClO4, n = 2, y = 2; L = L3, X = Cl, n = 2, y = 0; X = Br, I, n = 3, y = 2; X = ClO4, n = 2, y = 1; L = L4, X = Cl, n = 3, y = 2; X = Br, n = 3, y = 5; X = ClO4, n = 2, y = 0]. The complexes are characterised by elemental analysis, conductivity, thermal analysis, IR, 1H and 13C NMR spectral studies.