Acta Cryst. (2002). E58, o74-o76  [ doi:10.1107/S1600536801021304 ]

Bis(L-proline) hydrogen(1+) perchlorate

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

Abstract: In the title compound, 2C₅H₉NO₂·H⁺·ClO₄^-, two proline residues are linked by a strong O-HO hydrogen bond with an OO distance of 2.474  (6)  Å. Conformational disorder is observed in the pyrrolidine rings of the two proline residues. In one of the residues, both the major and minor conformers adopt conformations intermediate between half-chair and envelope, whereas in the other residue, they adopt envelope conformations. The crystal structure is stabilized by a number of N-HO hydrogen bonds.

Online 22 December 2001

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