Acta Cryst. (2002). E58, o862-o864  [ doi:10.1107/S1600536802012394 ]

Bis(L-proline) hydrogen nitrate

S. Pandiarajan, B. Sridhar and R. K. Rajaram

Abstract: In the title compound, 2C₅H₉NO₂·H⁺·NO₃^-, the two proline residues are linked by a strong O-HO hydrogen bond, with an OO distance of 2.414 (3) Å. In one of the residues, the pyrrolidine ring adopts an envelope conformation, while in the other it adopts a half-chair conformation. N-HO hydrogen bonds link the two residues to form double-chain structures down the a axis, which are interlinked by N-HO hydrogen bonds involving the O atoms of the nitrate ions.

Online 19 July 2002

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