(E)-N,N-Diethyl-2,6-diisopropyl-4-[2-(4-nitrophenyl)ethenyl]aniline

• Main Authors: Heiner Detert, Dieter Schollmeyer, Christoph Wink
• Format: Article
• Language: English
• Published: International Union of Crystallography 2013-12-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536813030948

The title compound, C24H32N2O2, was prepared by Horner olefination of 4-diethylamino-3,5-diisopropylbenzaldehyde and diethyl p-nitrobenzylphosphonate. There are two independent molecules (A and B) in the asymmetric unit. Their main axes, defined by the line connecting the N atoms of the nitro and amino groups, open an angle of 79.42 (3)°. Steric hindrance around the amino group is reflected in a long aryl C—N bond [1.434 (3) Å for molecule A and 1.440 (3) Å for molecule B], a pyramidal geometry [angle sum = 350.0 (2)° for molecule A and 349.6 (2)° for molecule B], and dihedral angles between the phenylene group and the plane defined by the CH2—N—CH2 unit of 86.9 (3)° for molecule A and 88.3 (3)° for molecule B. This gives structural support for the electronic decoupling of the amino group from the nearly planar nitrostilbene moiety (r.m.s. deviation for C, N and O atoms = 0.097 for molecule A and 0.107 Å for molecule B).