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  • Title: catena-Poly[[(2,2'-biimidazole-kappa2N,N')chlorocopper(II)]-mu-chloro].
    Author: Hu ML, Cai XQ, Chen JX.
    Journal: Acta Crystallogr C; 2005 Sep; 61(Pt 9):m403-5. PubMed ID: 16143759.
    Abstract:
    In the polymeric title compound, [CuCl2(C6H6N4)]n, each CuII ion is five-coordinated by four basal atoms (two N atoms from a 2,2'-biimidazole molecule and two Cl- anions) and one axial Cl- anion, in a distorted square-pyramidal coordination geometry. Cl- anions bridge the {Cu(C6H6N4)Cl} units into one-dimensional linear chains, which are reinforced by pi-pi interactions. Adjacent linear chains are linked by N-H...Cl hydrogen bonds, resulting in a grid layer. The hydrogen-bonding pattern can be described in graph-set notation as C(2)2(9)R(2)2(9)R(2)2(14). This study extends our knowledge of the multifunctional properties of the 2,2'-biimidazole ligand and of the coordination stereochemistry of copper(II).
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