Research Article: N′-(4-Diethyl­amino-2-hy­droxy­benzyl­idene)-4-methyl­benzohydrazide

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Xi-Hai Shen, Li-Juen Shao, Zhao-Fu Zhu, Li-Xue Zhu.


The title compound, C19H23N3O2, was prepared by condensing 4-diethyl­amino-2-hy­droxy­benzaldehyde and 4-methyl­benzo­hydrazide in methanol. The asymmetric unit contains two independent mol­ecules in which the two benzene rings make dihedral angles of 30.3 (3) and 18.9 (3)°. Intra­molecular O—H⋯N hydrogen bonds are observed in both mol­ecules. The crystal structure is stabilized by N—H⋯O hydrogen bonds, which form chains along the a axis.

Partial Text

For the structures of similar hydrazone compounds, see: Fun et al. (2011 ▶); Horkaew et al. (2011 ▶); Zhi et al. (2011 ▶); Huang & Wu (2010 ▶); Shen et al. (2012 ▶). For standard bond lengths, see: Allen et al. (1987 ▶).