title: 4-(Diethyl-amino)-salicyl-aldehyde azine.
abstract: The title compound, C(22)H(30)N(4)O(2), has a crystallographic inversion center located at the mid-point of the N-N single bond. Apart from the four ethyl C atoms, the non-H atoms are nearly coplanar with a mean deviation of 0.0596 (2) Å. An intra-molecular O-H⋯N hydrogen bond occurs. In the crystal, weak inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into layers parallel to (100).
authors.affiliation: Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules (Yanbian University), Ministry of Eduction, Yanji 133002, People's Republic of China.
authors.forename: Jing-Bo
authors.initials: JB
authors.lastname: Qiu
authors.forename: Bing-Zhu
authors.initials: BZ
authors.lastname: Yin