Acta Cryst. (2004). E60, o2014-o2016  [ doi:10.1107/S1600536804025206 ]

Zwitterionic 5-amino-2-naphthalenesulfonic acid

G. Smith, U. D. Wermuth, D. J. Young and J. M. White

Abstract: The crystal structure of 5-amino-2-naphthalenesulfonic acid (1,6-Cleve's acid), C₁₀H₉NO₃S, shows the presence of a sulfonate-aminium group zwitterion, viz. 5-ammonio-2-naphthalenesulfonate. All aminium H atoms are involved in head-to-tail intermolecular hydrogen-bonding interactions with separate sulfonate O-atom acceptors, giving a three-dimensional framework polymer structure.

Online 16 October 2004

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