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Open Access Crystal structure of 3-methylpyridinium picrate: a triclinic polymorph

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The title molecular salt, C6H8N+·C6H2N3O7− (systematic name: 3-methylpyridinium 2,4,6-trinitrophenolate), crystallizes in the triclinic space group P-1. The crystal structure of the monoclinic polymorph (space group P21/n) has been reported [Stilinovic & Kaitner (2011). Cryst. Growth Des. 11, 4110–4119]. In the crystal, the anion and cation are linked via bifurcated N—H...(O,O) hydrogen bonds, enclosing an R12(6) graph-set motif. These units are linked via C—H...O hydrogen bonds, forming a three-dimensional framework. Within the framework there are π–π interactions present, involving inversion-related picrate anions and inversion-related pyridinium cations, with inter-centroid distances of 3.7389 (14) and 3.560 (2) Å, respectively.
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Document Type: Research Article

Affiliations: PG and Research Department of Chemistry, Seethalakshmi Ramaswami College, Tiruchirappalli 620 002, Tamil Nadu, India

Publication date: January 1, 2015

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