title: Ethyl 5-amino-1-(6-chloro-pyridazin-3-yl)-1H-pyrazole-4-carboxyl-ate.
abstract: In the title compound, C(10)H(10)ClN(5)O(2), the dihedral angle between the aromatic rings is 0.16 (9)°. Two S(6) ring motifs are formed due to intra-molecular N-H⋯N and N-H⋯O hydrogen bonds. In the crystal, inversion dimers linked by pairs of N-H⋯N hydrogen bonds generate R(2) (2)(14) [or R(4) (4)(10) via the intra-molecular hydrogen bonds] ring motifs. Polymeric chains propagating in [210] are formed as a result of inter-linking the dimers by pairs of C-H⋯N inter-actions, completing R(2) (2)(6) ring motifs.
authors: Abdul Qayyum
authors: AQ
authors: Ather
authors: M Nawaz
authors: MN
authors: Tahir
authors: Misbahul Ain
authors: MA
authors: Khan
authors: Muhammad Makshoof
authors: MM
authors: Athar
authors: Eliana Aparecida Silicz
authors: EA
authors: Bueno
references: Acta Crystallogr Sect E Struct Rep Online. 2010 Jul 03;66(Pt 8):o1900
references: 21588234
references: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references: 19171970
references: Acta Crystallogr Sect E Struct Rep Online. 2010 May 12;66(Pt 6):o1327
references: 21579418
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr Sect E Struct Rep Online. 2010 Jul 14;66(Pt 8):o2016
references: 21588327