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)Cl₂]n, 3, possesses a helical zig-zag chain structure in which tetrahedral CoCl₂ centres are bridged by molecules of 1 having an extended conformation. The complex [Cu(1)Cl₂]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.