Research Article: 3,5-Diphenyl-1-(quinolin-2-yl)-4,5-dihydro-1H-pyrazol-5-ol

Date Published: August 01, 2012

Publisher: International Union of Crystallography

Author(s): Muhd. Hidayat bin Najib, Ai Ling Tan, David J. Young, Seik Weng Ng, Edward R. T. Tiekink.


In the title compound, C24H19N3O, the pyrazole ring is close to being planar (r.m.s. deviation of the five fitted atoms = 0.062 Å), and each of the N-bound quinoline ring [dihedral angle = 9.90 (7)°] and the C-bound phenyl ring in the 3-position is close to being coplanar [dihedral angle = 8.87 (9)°]. However, the phenyl ring in the 5-position forms a dihedral angle of 72.31 (9)°. The hy­droxy group forms an intra­molecular hydrogen bond to the quinoline N atom. In the crystal, mol­ecules are connected into supra­molecular layers two mol­ecules thick in the bc plane by C—H⋯O and C—H⋯π inter­actions.

Partial Text

For applications of coordination complexes of hydrazones as organic light emitting diodes and supra­molecular magnetic clusters, see: Zhang et al. (2011 ▶, 2012 ▶). For the synthesis of hydrazones, see: Gupta et al. (2007 ▶). For background to and the synthesis of the target mol­ecules, see: Najib et al. (2012a ▶,b ▶,c ▶)




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