Acta Cryst. (2004). E60, o107-o108  [ doi:10.1107/S1600536803025455 ]

Dimethyl(2-trimethylsilylethyl)[(2-trimethylsilylethyl)dimethylammonio]ammonium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate at 130  K

K. Hassall and J. White

Abstract: The crystal structure of the title compound, C₁₄H₃₉N₂Si₂⁺·C₃₂H₁₂F₂₄B^-, reveals a centrosymmetric cation consisting of two 2-(trimethylsilylethyl)dimethylamine molecules held together by a symmetrical NHN hydrogen bond. The N-H distance is 1.347  (2)  Å, the NN distance is 2.695  (3)  Å and the NHN angle is 180°. The tetrakis[3,5-bis(trifluoromethyl)phenyl]borate counter-ion lies on a crystallographic twofold axis of symmetry. The trifluoromethyl groups are disordered and were refined with partial occupancies.

Online 19 December 2003

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