title: Crystal structure of 2,3-bis-[(4-tert-butyl-2,6-di-methyl-phen-yl)imino]-butane.
abstract: The title compound, C28H40N2, was obtained from the condensation reaction of 4-tert-butyl-2,6-di-methyl-aniline and butane-2,3-dione. The mol-ecule lies on an inversion centre. The C=N bond has an E conformation. The plane of the benzene ring is almost perpendicular to the 1,4-di-aza-butadiene mean plane [dihedral angle = 89.8 (9)°].
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of the Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China.
authors.forename: Sheng-Lan
authors.initials: SL
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of the Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China.
authors.forename: Jian-Chao
authors.initials: JC
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of the Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
keywords: aniline; catalyst; crystal structure; di­imino­butane; α-di­imine ligand