Abstract
Two complexes of zinc(II) and copper(II) with tris(2‐benzimidazolylmethyl)amine (ntb) and the anion of acrylic acid of the compositions [M(ntb)(acrylate)](acrylate) · 2.5H2O (M = Zn or Cu) were synthesized and characterized by means of elemental analyses, thermal analyses, IR and H1 NMR spectra. The crystal structure of the novel compound [Zn(ntb)(acrylate)](acrylate) · 1.63H2O has been determined by a single‐crystal x‐ray diffraction method and shows that each zinc ion is linked to tris(2‐benzimidazolylmethyl)amine (ntb) and an acrylate; but another acrylate is the anion of the complex. The zinc ion is five‐coordinate with a N4O ligand set. The coordination geometries of the zinc ion maybe best described as a distorted trigonal‐bipyramid of site symmetry C3.