title: One-dimensional hydrogen-bonded infinite chain from nickel(II) tetraaza macrocyclic complex and 1,2-cyclopentanedicarboxylate ligand.
abstract: The reaction of [Ni(L)]Cl(2)·2H(2)O (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo [14,4,0(1.18),0(7.12)]docosane) with trans-1,2-cyclopentanedicarboxylic acid (H(2)-cpdc) yields a 1D hydrogen-bonded infinite chain with formula [Ni(L)(H-cpdc(-))(2)] (1). This complex has been characterized by X-ray crystallography, spectroscopy and cyclic voltammetry. The crystal structure of 1 exhibits a distorted octahedral geometry about Ni atom with four nitrogen atoms of the macrocycle and two oxygen atoms of the H-cpdc(-) ligand at the axial position. Compound 1 crystallizes in the monoclinic system P2(1)/c with a = 8.7429(17), b = 10.488(2), c = 18.929(4) Å, β = 91.82(2), V = 1734.8(6) Å(3), Z = 2. Electronic spectrum of 1 reveals a high-spin octahedral environment. Cyclic voltammetry of 1 undergoes two waves of a one-electron transfer corresponding to Ni(II)/Ni(III) and Ni(II)/Ni(I) processes.
authors: Department of Chemistry Education, Kongju National University, Kongju 314-701, Korea; E-Mail: hak124@kongju.ac.kr.
authors: In-Taek
authors: IT
authors: Lim
authors: Ki-Young
authors: KY
authors: Choi
mesh_terms: D001372:Aza Compounds / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003517:Cyclopentanes / Q000737:chemistry*; D006860:Hydrogen Bonding; D008024:Ligands; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*
chemical_list: D001372:Aza Compounds; D056831:Coordination Complexes; D003517:Cyclopentanes; D008024:Ligands; C066484:1,2-cyclopentanedicarboxylate; D009532:Nickel