Acta Cryst. (2006). E62, o3664-o3666  [ doi:10.1107/S1600536806029515 ]

Ethyl 1-acetyl-3-amino-1H-pyrazole-4-carboxylate, a tetragonal structure with Z' = 4

A. E. Koziol, T. Lis, E. Kolodziejczyk, A. Kusakiewicz-Dawid and B. Rzeszotarska

Abstract: The title compound, C₈H₁₁N₃O₃, crystallizes with Z' = 4. One pyrazole N atom is substituted and excluded from intermolecular contacts. The amine N, acetyl O and an ester O atom are involved in the formation of nearly planar molecular layers. The layers are perpendicular to the c axis, with an interlayer distance of 3.333 Å. The hydrogen-bonding patterns are similar for each molecule, i.e. intramolecular N-HO, as well as intermolecular N-HO and C-HN(pyrazole), bonds are present.

Online 4 August 2006

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