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Rerefinement of the co-crystal of 4-hydroxy­pyridine with 4-hydroxy­pyridinium nitrate

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The crystal structure of the title salt adduct, C5H6NO+·NO3·C5H5NO, has a C5H6NO+/C5HNO cation/mol­ecule assembly (which lies on an inversion center) whose components are linked through their O atoms by a short hydrogen bond [2.446 (3) Å]. The cation is formally the 4-hydroxy­pyridinium cation and the neutral component the 4-pyridinone mol­ecule, but the two could not be differentiated as they occupy equivalent positions, with the H atom disordered between them. The nitro­gen-bound H atom interacts with the nitrate ion [2.840 (1) Å], which lies on another special position of site symmetry 2.
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Document Type: Research Article

Publication date: December 1, 2004

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