Acta Crystallographica Section C

Crystal Structure Communications

Volume 69, Part 7 (July 2013)

organic compounds

Acta Cryst. (2013). C69, 761-764    [ doi:10.1107/S0108270113013929 ]

(E)-4-[(2-Carbamoylhydrazinyl­idene)meth­yl]-3-hy­droxy-5-hy­droxy­methyl-2-methyl­pyridin-1-ium nitrate

S. B. Novakovic, G. A. Bogdanovic, V. M. Leovac, M. V. Rodic, L. S. Vojinovic-Jesic and S. Ivkovic

Abstract: The title compound, C9H13N4O3+·NO3-, is the first structurally characterized Schiff base derived from semicarbazide and pyridoxal. Unusually for an unsubstituted semicarbazone, the compound adopts a syn conformation, in which the carbonyl O atom is in a cis disposition relative to the azomethine N atom. This arrangement is supported by a pair of hydrogen bonds between the organic cation and the nitrate anion. The cation is essentially planar, with only a hydroxy­methyl O atom deviating significantly from the mean plane of the remaining atoms (r.m.s. deviation of the remaining non-H atoms = 0.01 Å). The mol­ecules are linked into flat layers by N-H...O and C-H...O hydrogen bonds. O-H...O hydrogen bonds involving the hydroxymethyl group as a donor inter­connect the layers into a three-dimensional structure.

Formula: C9H13N4O3+·NO3-

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[ doi:10.1107/S0108270113013929/fa3317Isup3.cml ]
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