title: 2,2'-{1,1'-[Butane-1,4-diyl-bis(oxy-nitrilo)]di-ethylidyne}di-1-naphthol.
abstract: The title compound, C(28)H(28)N(2)O(4), was synthesized by the reaction of 2-acetyl-1-naphthol with 1,4-bis-(amino-oxy)butane in ethanol. The molecule, which lies about an inversion centre, adopts a linear structure, in which the oxime groups and naphthalene ring systems assume an anti conformation. The intra-molecular inter-planar distance between parallel naphthalene rings is 1.054 (3) Å. Intra-molecular O-H⋯N hydrogen bonds are formed between the oxime nitro-gen and hydr-oxy groups.
authors.affiliation: School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, People's Republic of China.
authors.forename: Wen-Kui
authors.initials: WK
authors.lastname: Dong
authors.forename: Jian-Chao
authors.initials: JC
authors.lastname: Wu
authors.forename: Yin-Xia
authors.initials: YX
authors.lastname: Sun
authors.forename: Jian
authors.initials: J
authors.lastname: Yao
authors.forename: Jun-Feng
authors.initials: JF
authors.lastname: Tong