title: 4-(4-Ethyl-phenyl-diazen-yl)phenol.
abstract: The crystal structure of the title compound, C(14)H(14)N(2)O, determined at 100 K, shows that the mol-ecules are not planar in the solid state, in contrast to other diazene (azobenzene) derivatives. The dihedral angle between the planes of the two aromatic rings is 42.32 (7)°. The mol-ecules are linked by inter-molecular O-H⋯N hydrogen bonds, forming an infinite one-dimensional chain.
authors.forename: Joost
authors.initials: J
authors.lastname: de Wit
authors.forename: Gert O R
authors.initials: GO
authors.lastname: Alberda van Ekenstein
authors.forename: Gerrit Ten
authors.initials: GT
authors.lastname: Brinke
authors.forename: Auke
authors.initials: A
authors.lastname: Meetsma