Experimental

R factor = 0.048; wR factor = 0.138; data-to-parameter ratio = 18.9. The complete molecule of the title compound, C20H26N4, is generated by a crystallographic centre of inversion and the central eight-carbon chain adopts a fully extended conformation. In the crystal, the molecules pack in layers parallel to (010). Related literature There are only few crystallographic reports of Schiff bases derived from 1,2-octanediamine; for details, see: Glidewell et al. (2005); Nathan et al. (2003); Viossat et al. (1997); Yamashita et al. (2003)