Crystal and molecular structure of bis-[2-(2-aminoethyl)pyridine]di-isothiocyanatocopper(II)

Abstract

The crystal and molecular structure of the title compound has been determined from three-dimensional X-ray diffractometer data. Crystals are monoclinic, space group P2₁/c with Z= 2 in a cell of dimensions a= 8·398(5), b= 14·751(10), c= 7·834(5)Å, and β= 102·35(4)°. The structure was refined by full-matrix least-squares techniques to R 0·033 for 1536 independent observed reflections. The complex is a six-co-ordinated monomer with tetragonally distorted octahedral geometry at copper; four nitrogen atoms from two substituted pyridine ligands form the equatorial plane, while nitrogen atoms from the NCS groups occupy the axial sites. As expected the axial Cu–N bond lengths [2·593(3)Å] are considerably longer than the equatorial [2·022(2) and 2·061 (2)Å]. The geometry at copper is different from that in either the analogous bromide or iodide complexes.