title: 4-Phenyl-diazenyl-2-[(R)-(1-phenyl-ethyl)imino-meth-yl]phenol.
abstract: The title chiral photochromic Schiff base compound, C(21)H(19)N(3)O, was synthesized from (R)-1-phenyl-ethyl-amine and the salicylaldehyde of an azobenzene derivative. The mol-ecule corresponds to the phenol-imine tautomer, the C=N and N-C bond distances being 1.279 (3) and 1.477 (3) Å, respectively. An intra-molecular O-H⋯N hydrogen bond occurs. The diazenyl group adopts a trans form with an N=N distance of 1.243 (3) Å.
authors.affiliation: Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Aritake
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Watanabe
authors.forename: Takashiro
authors.initials: T
authors.lastname: Akitsu