Acta Cryst. (2007). E63, m181-m183  [ doi:10.1107/S1600536806052810 ]

p-Phenylenediammonium tetrabromoaurate(III) bromide monohydrate

M. Rajeswaran, J. F. Bringley and B. Cleary

Abstract: The structure of the title compound, (C₆H₁₀N₂)[AuBr₄]Br·H₂O, consists of twin parallel stacks of square-planar [AuBr₄^-] polyhedra ordered along the a axis. The stacks are interleaved such that one Br atom of the AuBr₄^- square planes of one twin stack lies directly above or behind the Au atom from the neighboring stack, creating a pseudo-Jahn-Teller-like distorted octahedral coordination environment around the Au^III ions. The twin stacks are separated by parallel stacks of p-phenylenediammonium cations, and the structure is presumably held together by coulombic forces between the interdigitated negatively and positively charged one-dimensional stacks. The water molecule, the tetrabromoaurate anion and the bromide anion all lie on mirror planes.

Online 13 December 2006

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