title: Crystal structure of 5-di-ethyl-amino-2-({[4-(di-ethyl-amino)-phen-yl]imino}-meth-yl)phenol.
abstract: In the title compound, C21H29N3O, the dihedral angle between the planes of the aromatic rings is 8.1 (2)°. The ethyl groups at one terminal site of the compound are disordered over two sets of sites with occupancies of 0.775 (9) and 0.225 (9). The mol-ecule has an E conformation about the N=C bond. The mol-ecular structure features an intra-molecular O-H⋯N hydrogen bond, which closes an S(6) loop. In the crystal, weak C-H⋯π inter-actions leads to the formation of a three-dimensional network.
authors.affiliation: PG & Research Department of Chemistry, Chikkanna Government Arts College, Tiruppur 641 602, India.
authors.forename: C Vidya
authors.initials: CV
authors.lastname: Rani
authors.affiliation: Department of Physics, CPCL Polytechnic College, Chennai 600 068, India.
authors.forename: G
authors.initials: G
authors.lastname: Chakkaravarthi
authors.affiliation: PG & Research Department of Chemistry, Presidency College (Autonomous), Chennai 600 005, India.
authors.forename: N Indra
authors.initials: NI
authors.lastname: Gandhi
authors.affiliation: PG & Research Department of Chemistry, Chikkanna Government Arts College, Tiruppur 641 602, India.
authors.forename: G
authors.initials: G
authors.lastname: Rajagopal
keywords: C—H⋯π inter­actions; Schiff base; biological activity; crystal structure; intra­molecular hydrogen bond; pharmacological activity; phenol