An aryltellurium mixed halide anion. Preparation and crystal and molecular structure of [NBun4][PhTeCl3I]

Abstract

The crystal and molecular structure of the title compound has been determined from diffractometer data by the heavy-atom method. The crystals are triclinic, space group P, with unit-cell dimensions a= 11.449(4), b= 11.606(4), c= 12.060(3)Å, α= 94.33(2), β= 93.22(2), γ= 113.33(3)°, U= 1 460.8(8)ų, and Z= 2; R= 0.059 for 2 633 observed reflections [I/σ(I) 3.0]. The PhTeCl₃I^– anion is a square-based pyramid with a lone pair in the sixth position of an octahedron: Te–C 2.15(1), Te–Cl 2.565(4)–2.663(3), and Te–I 2.837(2)Å. Allowing for disorder, corrected values for Te–Cl and Te–l are 2.51 and 3.04 Å respectively.