Crystal structure of triiodobismuth(III)-tri-μ-iodo-tris(triphenylarsinoxide)-bismuth(III), C₅₄H₄₅As₃Bi₂I₆O₃

Abstract

The crystals of the title compound are triclinic, with unit-cell dimensionsa =14.804(7),b =18.657(9),c = 22.955(13) Å, α = 90.2(1), β 106.6(1), γ = 91.0(1) °, space groupP¯1, andZ = 4. The crystal structure has been determined from x-ray diffractometer data by direct methods and Fourier techniques, and refined by least-squares methods using 11,383 independent reflections (I> 2σ(I)) to anR value of 0.076. The structure consists of complex molecules with two distorted octahedra sharing a face. The first of the bismuth atoms is coordinated by six iodine atoms, three of them bridging, and the second by three bridging iodine atoms and three oxygen atoms of the triphenylarsinoxides. The orientation of the phenyl rings is the only significant difference between the two complex molecules in the asymmetric unit.