Journal
ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY
Volume 62, Issue -, Pages O567-O570Publisher
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S0108270106029209
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In the structure of L-prolinium picrate, C5H10NO2+.C6H2N3O7-, the C-gamma atom of the pyrrolidine ring has conformational disorder. Both the major and minor conformers of the pyrrolidine ring adopt conformations intermediate between a half-chair and an envelope. Both the cation and anion are packed through chelated three-centred N-(HO)-O-... hydrogen bonds. The prolinium cation connects two different picrate anions, leading to an infinite chain running along the b axis. In 2-methylpyridinium picrate, C6H8N+.C6H2N3O7-, the cations and anions are packed separately along the a axis and are interconnected by N-(HO)-O-... hydrogen bonds. Intramolecular contacts between phenolate O atoms and adjacent nitro groups are identified in both structures. A graph-set motif of R-1(2)(6) is observed in both structures.
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