Acta Crystallographica Section E (Sep 2010)

Ethyl 5-amino-1-(6-chloropyridazin-3-yl)-1H-pyrazole-4-carboxylate

  • Abdul Qayyum Ather,
  • M. Nawaz Tahir,
  • Misbahul Ain Khan,
  • Muhammad Makshoof Athar,
  • Eliana Aparecida Silicz Bueno

DOI
https://doi.org/10.1107/S1600536810034240
Journal volume & issue
Vol. 66, no. 9
pp. o2445 – o2445

Abstract

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In the title compound, C10H10ClN5O2, the dihedral angle between the aromatic rings is 0.16 (9)°. Two S(6) ring motifs are formed due to intramolecular N—H...N and N—H...O hydrogen bonds. In the crystal, inversion dimers linked by pairs of N—H...N hydrogen bonds generate R22(14) [or R44(10) via the intramolecular hydrogen bonds] ring motifs. Polymeric chains propagating in [210] are formed as a result of interlinking the dimers by pairs of C—H...N interactions, completing R22(6) ring motifs.