The synthesis and X-ray crystal structure of triiodotellurium(IV) hexafluoroarsenate(V), TeI3AsF6

Abstract

TeI3AsF6 was prepared quantitatively from the reaction of iodine, tellurium, and arsenic pentafluoride in sulphur dioxide solution. Single crystals of TeI3AsF6 are monoclinic, a = 8.243(2), b = 10.755(2), c = 12.660(2) Å; β = 100.91(2)°, V = 1102 Å3. The structure was refined in the space group P21/c to a conventional R factor of 0.075 for 1551 independent reflections with I ≥ 2σ(I). The structure consists of essentially discrete TeI3+ cations and AsF6– anions with some cation–anion interaction. The TeI3+ cation has approximate C3v symmetry with an average Te—I distance of 2.667 Å and I—Te—I angle of 99.90°.