title: 4-Diethyl-amino-3,5-diisopropyl-benzalde-hyde.
abstract: The title benzaldehyde, C(17)H(27)NO, was prepared via lithia-tion of bromoaniline and reaction with DMF. In the crystal, the molecule adopts a C2-symmetrical conformation; nevertheless, two modes of disorder are present: the orientation of the aldehyde group (occupancy ratio 0.5:0.5) and of symmetry-equivalent ethyl groups [occupancy ratio 0.595 (7):0.405 (7)]. The phenyl-ene ring and the carbonyl group are essentially coplanar [C-C-C-O torsion angle = -179.0 (4)°] but the dihedral angle between the mean planes of the phenyl-ene ring and the amino group = 67.5 (2)°. This and the long [1.414 (3) Å] aniline C-N bond indicate electronic decoupling between the carbonyl and amino groups. The angle sum of 359.9 (2)° around the N atom results from steric compression-induced rehybridization.
authors.affiliation: University Mainz, Duesbergweg 10-14, 55099 Mainz,  Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Wink
authors.forename: Dieter
authors.initials: D
authors.lastname: Schollmeyer
authors.forename: Heiner
authors.initials: H
authors.lastname: Detert