New versatile organyltellurium(IV) halides: Synthesis and X-ray structural features of the telluronium tellurolate salts [PhTe(CH3)(2)](2)[TeX6] (X = Cl, Br) and [Ph3Te][PhTeX4] (X = Cl, Br, I)

摘要

TeX4 (X = Cl, Br) react in HCl/HBr with [Ph(CH3)(2)Te]X (X = Cl, Br) to give [PhTe(CH3)(2)](2)[TeCl6] (1) and [PhTe(CH3)(2)](2)[TeBr6](2). The reaction of PhTeX3 (X = Cl, Br, I) in cooled methanol with [(Ph)(3)Te]X (X = Cl, Br, I) leads to [Ph3Te][PhTeCl4] (3), [Ph3Te][PhTeBr4] (4) and [Ph3Te][PhTeI4] (5). In the lattices of the telluronium tellurolate salts 1 and 2, octahedral TeCl6 and TeBr6 dianions are linked by telluronium cations through Te...Cl and Te...Br secondary bonds, attaining bidimensional (1) and three-dimensional (2) assemblies. The complexes 3, 4 and 5 show two kinds of Te...halogen secondary interactions: the anion-anion interactions, which form centrosymmetric dimers, and two identical sets of three telluronium-tellurolate interactions, which accomplish the centrosymmetric fundamental moiety of the supramolecular arrays of the three compounds, with the tellurium atoms attaining distorted octahedral geometries. Also phenyl C-H...halogen secondary interactions are structure forming forces in the crystalline structures of compounds 3, 4 and 5. (C) 2007 Elsevier B.V. All rights reserved.