Acta Cryst. (2006). E62, m2018-m2020  [ doi:10.1107/S1600536806029199 ]

4,4'-Bipyridinium tetrachloroaurate(III) chloride

X.-P. Zhang, G. Yang and S. W. Ng

Abstract: The reaction of gold(III) chloride and 4,4'-bipyridine yields the compound (C₁₀H₈N₂)[AuCl₃]₂, which is converted to the ionic title compound (C₁₀H₁₀N₂)[AuCl₄]Cl upon recrystallization from DMSO. The Au^III ion in the tetrachloroaurate anion exhibits a square-planar geometry; this anion is linked to the bipyridinium cation by an N-H·Cl hydrogen bond to form chains which extend parallel to the b axis. The bipyridinium cation exhibits 2 symmetry, whereas the tetrachloroaurate anion shows 2/m symmetry, and the chloride anion is located on a position with 222 symmetry.

Online 2 August 2006

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