| Abstract: | Synthesis and Spectroscopic Characterization of Copper(II) and Nickel(II) Tricyanomethanide Complexes with Imidazoles – Crystal Structure of Cu{C(CN)3}2(2-meiz)2] The copper(II) and nickel(II) tricyanomethanide complexes with imidazoles of the type Cu{C(CN)3}2L4], L = 2- or 4-methylimidazole (meiz)] and M{C(CN)3}2L2] M = Cu, L = imidazole (iz), 2- or 4-meiz; M = Ni, L = iz, 2- or 4-meiz] were prepared and characterized by electronic, infrared, and – some of them – by ESR spectroscopy. The structure Cu{C(CN)3}2(2-meiz)2], solved by X-ray crystallographic analysis, shows a two-dimensional network with unsymmetric C(CN)3-bridges between the CuII atoms. Polymeric structures with bridging C(CN)3-groups were identified by means of spectroscopic methods also for the other M{C(CN)3}2L2] complexes. On the other hand, for the complexes M{C(CN)3}2L4] follow molecular structures, in which monodentate C(CN)3 ligands are present. All compounds under investigation show a tetragonal-bipyramidal geometry with various degree of tetragonal distortion. |
