Crystal and molecular structure of α-di-iodo(dimethyl)tellurium

Abstract

Crystals of the title compound are monoclinic, space group P2₁/c with cell dimensions a= 9·439(1), b= 21·991(2)c= 12·217(1)Å, β= 107·63(1)°, and Z= 12. The structure was determined from three-dimensional X-ray data collected by counter methods and refined by full-matrix least-squares techniques to R 5·4% for 2191 observed reflections. Each tellurium atom has a distorted octahedral environment with two iodine atoms in a trans-arrangement, two methyl groups cis- to each other, and two contacts from iodine atoms attached to neighbouring molecules. Intramolecular Te–I bonds range from 2·854(3) to 2·994(3)Å and Te–C bonds range from 2·10(3) to 2·16(3)Å. The intermolecular Te ⋯ I contacts range from 3·659(3) to 4·030(3)Å. Differences in bond lengths and angles can be correlated with the differing distortions in the environment of each tellurium atom.