Acta Cryst. (2003). E59, o244-o246  [ doi:10.1107/S1600536803002009 ]

5,6-Dioxo-1,10-phenanthrolin-1-ium bromide at 120  K

J. A. S. Bomfim, C. A. L. Filgueiras, R. A. Howie and J. L. Wardell

Abstract: The title compound, C₁₂H₇N₂O₂⁺·Br^- is, to our knowledge, the first reported example of a simple salt of cationic mono-N-protonated 1,10-phenanthroline-5,6-dione. All of the atoms lie on a crystallographic mirror plane and the cation is therefore totally planar. As a consequence, the compound has a well defined layer structure in which N-HBr, C-HBr and C-HO contacts within the layers interconnect the ionic species.

Online 31 January 2003

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