Received 7 October 2013
The asymmetric unit of the title compound, 2C18H15Te+·2Br-·C3H6O or Ph3TeBr·0.5Me2CO, contains two crystallographically independent triphenyltelluronium cations, two bromide anions, and one disordered [site-occupancy ratio = 0.581 (7):0.419 (7)] solvent molecule. Interionic TeBr interactions connect the cations and anions into a tetrameric step-like structure. The primary coordination spheres of both Te atoms are TeC3 trigonal pyramids: three short secondary tellurium-bromine interactions expand the coordination geometry of one of the Te atoms to an octahedron. While the other Te atom shows only two TeBr secondary bonding interactions, it is also six-coordinated due to a Te interaction [3.769 (2) Å] with one of the phenyl rings of the adjacent cation.
For the structures of unsolvated triphenyltelluronium chloride and Ph3TeCl. 0.5CHCl3, see: Ziolo & Extine (1980) and Collins et al. (1988), respectively. For the preparation of [(Ph3PO)2H]2[Te2Br10], see: Närhi et al. (2004). For Te interactions, see: Zukerman-Schpector & Haiduc (2002). For Te-C bond lengths in triphenyltelluronium cations, see: Oilunkaniemi et al. (2001).
Data collection: COLLECT (Bruker, 2008); cell refinement: DENZO-SMN (Otwinowski & Minor, 1997); data reduction: DENZO-SMN; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2006); software used to prepare material for publication: WinGX (Farrugia, 2012).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB7149 ).
Financial support from the Academy of Finland is gratefully acknowledged.
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