Synthesis and properties of one-dimensional Ni(II) and Ni(II)Cu(II) complexes linked by hydrogen bond

Four dithiooxalato (Dto) bridged one-dimensional Ni(II) and Ni(II)Cu(II) complexes (Me-6[14]dieneN(4))Ni-2(Dto)(2)) (1), (Me-6[14]dieneN(4))CuNi(Dto)(2) (2),' (Me-6[14]aneN(4))Ni-2(Dto)(2) (3), and (Me-6[14]aneN(4))CuNi(Dto)(2) (4), were synthesized. These complexes have been characterized by elemental analysis, IR, UV and ESR spectra. The crystal structure of complex 3 was determined. It crystallizes in the monoclinic system, space group C2/c with a = 2.2425(4) nm, b = 1.0088(2) nm, c = 1.4665(3) nm, beta = 125.32(3)degrees; Z = 4; R = 0.076, R-w = 0.079. In the complex, Ni(1) coordinates four sulphur atoms of two Dto ligands in plane square environment. Ni(2) lies in the center of macrocyclic ligand. For Dto ligand, two sulphur atoms coordinate Ni(l), and 0(1) coordinates Ni(2) and forms weak coordination bond. O(2) is linked to N(2) of macrocyclic ligand through hydrogen bond.