One-Dimensional Coordination Polymer Assembled by Tetraaza Macrocyclic Nickel(II) Complex and trans-1,4-Cyclohexanedicarboxylate ligand

Abstract

The reaction of [Ni(L)]Cl-2 center dot 2H(2)O (L = 3.14-dimethyl-2,6,13,17-tetraazatricyclo[14,4,0(1.18),0(7.12)]docosane) with trans-1,4-cyclohexanedicarboxylic acid (H(2)chdc) generates a 1D coordination and 2D hydrogen-bonded polymer {[Ni(L)(chdc)(2)]center dot 2H(2)O}(n) (1). The polymer complex was characterized by X-ray crystallography, spectroscopy and magnetic susceptibility. Each nickel(II) ion has a distorted octahedral coordination environment with the four secondary amines of the macrocycle in which two trans carboxylate anions of the chdc(2-) ligand have assembled around each nickel center. The electronic spectrum of 1 in the solid state exhibits a high-spin octahedral environment. The magnetic behavior of 1 reveals a weak intramolecular anti-ferromagnetic interaction with J values of -1.15(2) cm(-1).