Synthesis and X-ray crystal structures of cobalt and copper complexes of 1,3-bis(benzotriazolyl)propanes

Two propylene-bridged bis-benzotriazole ligands, 1 and 2, were used to obtain three novel coordination polymers with cobalt(II), copper(II) and copper(I). The complexes were structurally characterised by X-ray crystallography. The complex [Co(1)Cl-2](n) 3, possesses a helical zigzag chain structure in which tetrahedral CoCl2 centres are bridged by molecules of 1 having an extended conformation. The complex [Cu(1)Cl-2](n), 4, exhibits a more complex supramolecular architecture, which extends in two dimensions, with bridging through Cu2Cl4 dimeric units in one direction and through the organic ligand in an orthogonal direction. The complex [Cu(2)Cl](n), 6, has a one-dimensional polymeric structure involving 16-membered M2L2 rings bridged by Cu2Cl2 units. (C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.