title: L-prolinium picrate and 2-methylpyridinium picrate.
abstract: In the structure of L-prolinium picrate, C5H10NO2+.C6H2N3O7-, the Cgamma 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-H...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-H...O hydrogen bonds. Intramolecular contacts between phenolate O atoms and adjacent nitro groups are identified in both structures. A graph-set motif of R1(2)(6) is observed in both structures.
authors.affiliation: Department of Physics, Madurai Kamaraj University, Madurai 625 021, India. xrdsopmku@yahoo.com
authors.forename: K
authors.initials: K
authors.lastname: Anitha
authors.forename: S
authors.initials: S
authors.lastname: Athimoolam
authors.forename: S
authors.initials: S
authors.lastname: Natarajan