Date Published: March 01, 2012
Publisher: International Union of Crystallography
Author(s): Hoong-Kun Fun, Premrudee Promdet, Jirapa Horkaew, Suchada Chantrapromma.
In the asymmetric unit of the title compound, C18H20N2O5, there are two crystallographic independent molecules. Both molecules are twisted; the dihedral angle between the two benzene rings is 7.2 (5)° in one molecule, whereas it is 85.9 (4)° in the other. Of the three methoxy groups in the 3,4,5-trimethoxyphenyl unit, two methoxy groups at meta positions are approximately coplanar with the benzene plane [C—O—C—C torsion angles of −2.3 (13)–4.8 (11)°], but the other methoxy, at the para position, is out of the plane [C—O—C—C of 72.8 (9)° in one molecule and −77.5 (9)° in the other]. In the crystal, molecules are linked by N—H⋯O hydrogen bonds and weak C—H⋯O interactions into tapes along the b axis. C—H⋯π interactions are also present.
For bond-length data, see: Allen et al. (1987 ▶). For related structures, see: Fun et al. (2011 ▶); Horkaew et al. (2011 ▶); Promdet et al. (2011 ▶). For background and applications of benzohydrazide derivatives, see: Angelusiu et al. (2010 ▶); Bedia et al. (2006 ▶); Loncle et al. (2004 ▶); Melnyk et al. (2006 ▶); Raj et al. (2007 ▶).