Diaquabis[4-(4<i>H</i>-1,2,4-triazol-4-yl)benzoato-κ<sup>2</sup><i>O</i>,<i>O</i>′]cobalt(II), and the cadmium(II) and copper(II) analogues: new self-complementary hydrogen-bond donor/acceptor modules for designing hydrogen-bonded frameworks
作者:Liliana V. Lukashuk、Andrey B. Lysenko、Eduard B. Rusanov、Alexander N. Chernega、Konstantin V. Domasevitch
DOI:10.1107/s0108270107009080
日期:2007.4.15
In the isostructural title complexes, [M(C9H6N3O2)(2)(H2O)(2)] [ M = Co II, (I), Cd II, (II), and Cu II, (III); the metal centres reside on a twofold axis in the space group C2/c for (I) and (II)], the metal centres are surrounded by four O atoms from two O,O'-bidentate carboxylate groups and by two trans-coordinated aqua ligands, forming a distorted octahedral environment. The molecules possess four hydrogen-bond donor ( two aqua ligands) and four hydrogen-bond acceptor sites (two triazole groups), and aggregate by self-association, forming two-dimensional hydrogen- bonded frameworks [via O - H center dot center dot center dot N interactions; O center dot center dot center dot N = 2.749 (3) - 2.872 (3) angstrom]. The layers are parallel and are tightly packed with short interlayer distances of 4.93, 4.95 and 5.01 angstrom for (I), (II) and (III), respectively.