Studies on tellurium-carbon bonded compounds. II. The crystal structure of [Heptane-3,5-dionato(2–)]tellurium(II) ('1,1′-Dimethylacetylacetone tellurium(II)')

Abstract

The structure of the title compound has been determined by the heavy- atom method from 973 reflections, measured with a diffractometer, and refined by full-matrix least-squares methods to R 0.030. Crystals are monoclinic, space group P2₁, a = 8.69(1), b = 4.86(1), c = 10.14(2) Ǻ, β = 98.7(1)°, Z = 2. In the discrete molecules of the complex a tellurium(II) atom is bonded to one bivalent heptane-3,5-dione ligand through the α-carbon atoms [Te-C 2.184(6), 2.206(7) Ǻ; C-Te-C 89.7(3)°], forming a heterocyclic ring of chair conformation with the methyl substituents both in equatorial positions. The molecules are arranged in a zig-zag polymeric manner about the 2₁ axes at x = 0 and z = 0. All hydrogen atoms have been located.