SYNTHESIS, CHARACTERIZATION AND CRYSTAL STRUCTURE DETERMINATION OF A PYRAZINE-2-CARBOXAMIDE-BRIDGED TWO-DIMENSIONAL POLYMERIC COPPER(II) COMPLEX

摘要

The new complex of [Cu(PYZ-AM)_2]_n(NO_3)_(2n)·2nCH_3OH (1) was synthesized from the reaction of Cu(NO_3)_2·3H_2O with pyrazine-2-carboxamide (PYZ-AM) in methanolic solution. Suitable crystals of 1 for X-ray single crystal diffraction analysis were obtained by slow evaporation from methanol. Resulted complex was characterized by IR, UV-Vis, elemental analysis, thermal analysis and single crystal X-ray diffraction. The polymeric title compound, [Cu(PYZ-AM)_2]_n(NO_3)_(2n)·2nCH_3OH crystallizes with one copper ion, two pyrazine-2-amide ligand, two nitrate anions and two methanol molecules in the asymmetric unit in C2/c monoclinic space group. The coordination geometry of copper ion is an elongated octahedral type. This compound has an equatorial-axial-type pyrazineamide bridge in the two-dimensional grid polymer.