Acta Cryst. (2001). C57, 1184-1188  [ doi:10.1107/S0108270101010757 ]

Hydrogen bonding in the inner-salt zwitterion and in two different charged forms of 5,6-bis(2-pyridyl)pyrazine-2,3-dicarboxylic acid

M. Alfonso, Y. Wang and H. Stoeckli-Evans

Formula: C₁₆H₁₀N₄O₄ and three salts of C₁₆H₁₁N₄O₄⁺

Online 12 October 2001

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