Studies of the Metal Complexes of Cyclohexane Derivatives. IV. Copper(II) and Nickel(II) Complexes of 1,2-Cyclohexanediamine Isomers

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Abstract
Two types of copper(II) complexes, Cu(c-chxn)2X2·nH2O and Cu(t-chxn)2X2·nH2O (X=Cl−, Br−, NO3−, and ClO4−, n=0–2), and three types of nickel(II) complexes, [Ni(c-chxn)2]X2, [Ni(c-chxn)3]X2·nH2O (X=Cl−, Br−, NO3−, and ClO4−, n=0.5–1.5) and [Ni(t-chxn)2(H2O)2]X2 (X=Br− and ClO4−), were synthesized. Here, c-chxn and t-chxn stand for cis- and trans-1,2-cyclohexanediamine respectively. Based upon the analyses of the electronic spectra and magnetic moments, the structures of the copper(II) complexes synthesized were found to be distorted octahedrons. The influence of the steric configurations of the diamine isomers on the structures of the copper(II) complexes is small. The three types of nickel(II) complexes were found to have square planar, octahedral, and distorted octahedral structures respectively. The steric influence of the ligands on the properties of the nickel(II) complexes was also considered.
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