Research Article: 1-[5-(4-Chloro­phen­yl)-3-(4-hy­droxy­phen­yl)-4,5-dihydro-1H-pyrazol-1-yl]­ethanone

Date Published: March 01, 2012

Publisher: International Union of Crystallography

Author(s): Hoong-Kun Fun, Ching Kheng Quah, S. Priya, B. Narayana, B. K. Sarojini.


In the title compound, C17H15ClN2O2, the benzene rings form dihedral angles of 89.56 (5) and 5.87 (5)° with the mean plane of the pyrazoline ring (r.m.s. deviation = 0.084 Å). The dihedral angle between the two benzene rings is 87.57 (5)°. In the crystal, mol­ecules are linked by O—H⋯O and C—H⋯O hydrogen bonds into a helical chain along the c axis. Between the chains weak C—H⋯N and C—H⋯O inter­actions are present. The crystal studied was an inversion twin with a domain ratio of 0.72 (4):0.28 (4).

Partial Text

For general background to and the biological activities of pyrazolines, see: Samshuddin et al. (2011 ▶); Sarojini et al. (2010 ▶). For standard bond-length data, see: Allen et al. (1987 ▶). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986 ▶). For a related structure, see: Fun et al. (2010 ▶).