Acta Cryst. (2007). E63, o1332-o1333  [ doi:10.1107/S1600536807006630 ]

trans-4,4'-Azopyridine N,N'-dioxide dihydrochloride

H.-H. Song and B.-Q. Ma

Abstract: The title compound is a salt, trans-1,1'-dihydroxy-4,4'-diazenediyldipyridinium dichloride, C₁₀H₁₀N₄O₂²⁺·2C l^-, in which the trans-4,4'-azopyridine N,N'-dioxide cation is located on an inversion centre with the pyridine N-oxide atoms protonated. The Cl^- anions form strong hydrogen bonds to these H atoms. Weak C-HCl hydrogen bonds link the cations and anions into a two-dimensional sheet.

Online 16 February 2007

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