The layered structure of poly[[di-mu-chloro-bis[chloro(2-ethyltetrazole-kappaN(4))copper(II)]]-di-mu-2-ethyltetrazole-kappa(2)N(1):N(4)

Abstract

In the polymeric title complex, [CuCl(2)(C(3)H(6)N(4))(2)](n), there are two ligands in the asymmetric unit. The Cu atom adopts an elongated octahedral geometry, with two 2-ethyltetrazole ligands [Cu-N = 2.0037 (16) and 2.0136 (16) A] and two Cl atoms [Cu-Cl = 2.2595 (6) and 2.2796 (6) A] in equatorial positions. A Cl atom and a symmetry-related 2-ethyltetrazole molecule [Cu-Cl = 2.8845 (8) A and Cu-N = 2.851 (2) A] lie in the axial positions of the octahedron. One of the two 2-ethyltetrazole ligands of the asymmetric unit exhibits bidentate binding to two Cu atoms through two N atoms of the tetrazole ring, whereas the other ligand is coordinated in a monodentate fashion via one tetrazole N atom. The Cu-atom octahedra form dimer entities by sharing edges with equatorial and axial Cl atoms. The dimers are linked together through the 2-ethyltetrazole ligands to form one-dimensional polymeric zigzag chains extending along the b axis. The chains are connected into infinite layers parallel to the (10-1) plane via the 2-ethyltetrazole ligands.