Structure of catena-bis[4-(2-aminoethyl)imidazole-N3,N8]-μ-chloro-copper(II) chloride dihydrate

Abstract

The distortion of the square pyramid is also important, but less severe than that of the trigonal bipyramid. The four basal atoms N(1), N(2), Br(1) and Br(2) deviate strongly from coplanarity by 0.240, -0.247, -0-183 and 0.190 A, respectively, while the Cu atom deviates from this plane by 0.252 A in the direction of the apical Br atom. The dihedral angle between the unweighted mean planes N(1)-Cu-N(2) and Br(1)-Cu-Br(2) is 24.9 °, thus indicating a distortion towards tetrahedrality, which is quite common in '4 + 1' complexes. The distances and angles of the di-2-pyridylmethane ligand are comparable with those found by us for chloro(di-2-pyridylmethane)-(di-2-pyridylmethanol)copper(II) perchlorate (Garland, Le Marouille, Spodine & Manzur, 1986).The structure of the dibromo(di-2-pyridylmethane)-copper(II) complex is similar to that found in the bis[dibromo(4-methyloxazole)copper(II)] complex (Marsh et al., 1982), in the sense that all metal-ligand distances are comparable. However, in their case the Cu atom deviates from the basal plane of the pyramid by 0.309 A, and the in-plane Br(1)--Cu--Br (2)

Halide-bridged polymers of divalent metals with donor ligands – structures and properties

“…5), the related [{Cu(-Cl)cyclam} 2 ]CdCl 4 [48] and the compound [CuCl(amim) 2 ]Cl·2H 2 O [49] in which two bidentate N donor ligands instead of the cyclam macrocycle occupy the positions in the equatorial plane of the pseudo-octahedron.…”