Triphenyltelluronium(IV) bromide acetone hemisolvate

Sari M Närhi,Raija Oilunkaniemi,Risto S Laitinen

doi:10.1107/s160053681302816x

Sari M Närhi, Raija Oilunkaniemi + Show 1 more

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https://doi.org/10.1107/s160053681302816x

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Abstract

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 Te⋯Br 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 Te⋯Br secondary bonding interactions, it is also six-coordinated due to a Te⋯π interaction [3.769 (2) Å] with one of the phenyl rings of the adjacent cation.

Highlights

Data collectionKey indicators: single-crystal X-ray study; T = 150 K; mean (C–C) = 0.007 Å; disorder in solvent or counterion; R factor = 0.037; wR factor = 0.106; data-toparameter ratio = 17.1
The asymmetric unit of the title compound, 2C18H15Te+2BrC3H6O or Ph3TeBr0.5Me2CO, contains two crystallographically independent triphenyltelluronium cations, two bromide anions, and one disordered [site-occupancy ratio =
The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry

Summary

Data collection

Key indicators: single-crystal X-ray study; T = 150 K; mean (C–C) = 0.007 Å; disorder in solvent or counterion; R factor = 0.037; wR factor = 0.106; data-toparameter ratio = 17.1. The asymmetric unit of the title compound, 2C18H15Te+2BrC3H6O or Ph3TeBr0.5Me2CO, contains two crystallographically independent triphenyltelluronium cations, two bromide anions, and one disordered [site-occupancy ratio =. Interionic Te Br interactions connect the cations and anions into a tetrameric steplike 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 Te Br secondary bonding interactions, it is six-coordinated due to a Te interaction [3.769 (2) Å] with one of the phenyl rings of the adjacent cation

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