Wu, Huilu, Ying, Wei, Fan, Xuyang, Sun, Qingyu, Qi, Baoliang, and Xu, Yuhao
Three five-coordinate zinc complexes containing the tripod ligand, tris(N-methylbenzimidazol-2-ylmethyl)amine (Mentb) and three different α,β-unsaturated carboxylates, with compositions [Zn(Mentb)(L1-3)](ClO4) ·nH2O (L1 = trans-cinnamate; L2 = 2-hydroxycinnamate; L3 = 4-hydroxycinnamate; n = 0.5, 2, 1) were synthesized and characterized by means of elemental analyses, electrical conductivity measuerments, IR, UV, and 1H NMR spectra. The crystal structure of [Zn(Mentb)(L3)](ClO4) · DMF · C2H5OH · 0.5CH3OH has been determined by single-crystal X-ray diffraction, and shows that the ZnII atom is bonded to a tris(N-methylbenzimidazol-2-ylmethyl)amine (Mentb) ligand and a 4-hydroxycinnamate ligand through four N atoms and one O atom, resulting in a distorted trigonal-bipyramidal coordination geometry (τ = 0.86), with approximate C3 symmetry. [ABSTRACT FROM AUTHOR]