Crystal structure of a linear polymeric 1 : 1 adduct of copper(I) chloride and 2,3-diazabicyclo[2,2,1]hept-2-ene

Abstract

The crystal structure of the title compound has been determined by Patterson and Fourier methods from single-crystal photographic X-ray diffraction data, and refined by full-matrix least-squares methods to R 0·11 (401 reflections). Crystals are orthorhombic, space group Pb2₁m, a= 9·63(1), b= 10·64(1), c= 6·71(1)Å, Z= 4.

The structure comprises a linear chain of copper atoms alternately spaced at 3·32 and 3·39(1)Å, the copper atoms being spanned by ligand and chlorine bridges; the copper environment is basically a distorted tetrahedron : Cu–Cl 2·37 and 2·38(1), Cu–N 1·88 and 1·92(2)Å; N–Cu–N^I 128(1), Cl–Cu–Cl^I, 117(1), N–Cu–Cl, 100–106°.