Abstract
In the title hydrate, C5H4N2O2·H2O, the pyridazine ring is essentially planar, with an r.m.s. deviation of 0.0025 Å. In the crystal, O—H⋯O and N—H⋯O hydrogen bonds link the molecules into a one-dimensional chain.
Highlights
In the title hydrate, C5H4N2O2ÁH2O, the pyridazine ring is essentially planar, with an r.m.s. deviation of 0.0025 A
O—HÁ Á ÁO and N—HÁ Á ÁO hydrogen bonds link the molecules into a one-dimensional chain
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: JJ2141)
Summary
Key indicators: single-crystal X-ray study; T = 296 K; mean (C–C) = 0.004 A; R factor = 0.051; wR factor = 0.159; data-to-parameter ratio = 12.9. C5H4N2O2ÁH2O, the pyridazine ring is essentially planar, with an r.m.s. deviation of 0.0025 A. O—HÁ Á ÁO and N—HÁ Á ÁO hydrogen bonds link the molecules into a one-dimensional chain. Related literature For the biological functions of pyridazine and its derivatives, see: Heinisch & Kopelent (1992). For bond lengths and angles in related compounds, see: Sarkhel & Desiraju (2004). Monoclinic, P21=c a = 8.978 (2) Ab = 6.4150 (16) Ac = 11.354 (3) A = 101.696 (3) V = 640.4 (3) A 3
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