title: 4-[2-(4-Chloro-phen-yl)hydrazinyl-idene]-3-methyl-1H-pyrazol-5(4H)-one.
abstract: In the title compound, C(10)H(9)ClN(4)O, the pyrazole ring [maximum deviation = 0.014 (2) Å] forms a dihedral angle of 7.06 (14)° with the chloro-benzene ring. The mol-ecular conformation is stabilized by an intra-molecular N-H⋯O hydrogen bond, which generates an S(6) ring motif. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds generate R(2) (2)(16) ring motifs. The dimers are further connected by N-H⋯N hydrogen bonds, thereby forming layers lying parallel to the bc plane.
authors: Hoong-Kun
authors: HK
authors: Fun
authors: Ching Kheng
authors: CK
authors: Quah
authors: Nithinchandra
authors: Balakrishna
authors: B
authors: Kalluraya