Structure of the oxooctathiotritungstate ion W3OS82-

[(sup(n)C4H9)4N]2W3OS8 crystallizes with Z = 6 in the monoclinic space group Pc with cell dimensions a = 24.491(5) A, b = 14.990(5) A, c = 19.982(5) A, β = 92.3(2)0. The structure has been determined from single crystal X-ray data by means of Patterson and Fourier syntheses and refined to a final conventional R value of 0.148 using 4032 independent reflexions. The structure of the W3OS82- ion can be described as consisting of two distorted WS4 tetrahedra. The third tungsten atom has a distorted quadratic-pyramidal configuration with four sulfur atoms at the base and one oxygen atom at the apex of this polyhedron. The quadratic pyramid is connected with the two tetrahedra by two common S2 edges. (author)