Crystal and molecular structure of µ-chloro-chlorobis[3,4-bis(2-aminoethylthio)toluene]dicopper(II) diperchlorate

Abstract

Crystals of the title compound are monoclinic, a= 12.323(2), b= 10.426(3), c= 27.689(6)Å. β= 101.53(2)°, Z= 8, space group P21/c. The complex cation is binuclear with one bridging chloride ion. The stereochemistry at one copper centre is distorted octahedral and at the other distorted square pyramidal. The copper–nitrogen bonds occupy trans-equatorial positions and are similar in length (Cu–N 1.99, 2.02, and 1.98 Å at the two centres) whereas a sulphur donor occupies an axial site in each co-ordination sphere to give two long copper–sulphur bonds (2.61 and 2.57 Å). The remaining two equatorial bonds (Cu–S 2.45 and 2.43 Å) are also somewhat longer than usual. The structure was determined by a combination of Patterson and direct methods from 1 733 diffracto-meter intensities, and refined by full-matrix least-squares techniques to R 0.062.