Received 4 December 2011
The title compound, C9H13Br2ClNTe, was synthesized by reacting [2-(dimethylaminomethyl)phenyl]tellurium(II) chloride with Br2. As a consequence, the Cl and Br atoms are not well ordered but distributed over the three possible positions such that the overall stiochiometry is two Br atoms and one Cl atom. The scrambling of the Br and Cl atoms indicates a small energy barrier for the exchange process between the apical and equatorial positions. Overall, the Te atom geometry is slightly distorted square pyramidal ( = 0.052 for the major component). However, there is a weak secondary interaction between the Te atoms and the disordered Br/Cl atoms of a nearby molecule. The Te-Br and Te-Cl distances in both disorder components fall into two groups; a longer distance for the Br/Cl involved in this secondary interaction [2.6945 (17) Å for Br and 2.601 (9)Å for Cl] and shorter bond distances to the remaining halogen atoms, indicating that this interaction has slightly weakened the Te-X bond, as is the case in the previously reported tribromido structure [Singh et al. (1990). J. Chem. Soc. Dalton Trans. pp. 907-913]. Otherwise, the metrical parameters in the two structures are not significantly different. An intermolecular C-HBr interaction occurs.
For related structures, see: Panda et al. (1999); Singh & McWhinnie (1985); Singh et al. (1992); Singh et al. (1990). For the synthesis of similar dibromidochlorido derivatives of tellurium, see: Rivkin et al. (1991); Cobbledick et al. (1979). For the asymmetry parameter, see: Addison et al. (1984). For the preparation of bis[2-(dimethylaminomethyl)phenyl]ditelluride, see: Kaur et al. (1995).
Data collection: CrysAlis PRO (Oxford Diffraction, 2007); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: JJ2114 ).
RJB acknowledges the NSF-MRI program (grant CHE-0619278) for funds to purchase the diffractometer. HBS acknowledges the DST for funding and PR acknowledges the CSIR for a fellowship.
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