One-Dimensional Hydrogen-Bonded Polymer from Hexaazamacrotetracyclic Nickel(II) Complex and trans-1,4-Cyclohexanedicarboxylate Ligand

The reaction of Ni(L)](ClO₄)₂·2H₂O (L) = 1,3,10,12,16,19-hexaazatetracyclo17,3,1,1^12.16,0^4.9]tetracosane) with trans-1,4-cyclohexanedicarboxylic acid (H₂-chdc) produces a 1D hydrogen-bonded polymer with formula Ni(L)(H-chdc⁻)₂] (1). This polymer complex has been characterized by X-ray crystallography, spectroscopy and magnetic susceptibility. The crystal structure of 1 shows a distorted octahedral coordination geometry about Ni with two secondary and two tertiary amines of the macrocycle and two oxygen atoms of the H-chdc⁻ ligand at the trans position. Electronic spectrum of 1 exhibits a high-spin octahedral environment. The magnetic behavior of 1 reveals a very weak antiferromagnetic interaction with J values of −0.66(2) cm⁻¹ .