title: 2,2'-{1,1'-[Pentane-1,5-diylbis(oxy-nitrilo)]diethylidyne}di-1-naphthol.
abstract: The title compound, C(29)H(30)N(2)O(4), adopts a distorted Z configuration with respect to the oxime group, which is almost coplanar with the adjacent naphthalene ring [dihedral angle = 4.11 (2)°]. There is one half-mol-ecule in the asymmetric unit, with a crystallographic twofold rotation axis passing through the central C atom of the -CH=N-O-(CH)(5)-O-N=CH- bridge. Within the mol-ecule, the dihedral angle formed by the two naphthalene rings is 79.08 (3)°, and there are two intra-molecular O-H⋯N hydrogen bonds.
authors.affiliation: School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, People's Republic of China.
authors.forename: Yin-Xia
authors.initials: YX
authors.lastname: Sun
authors.forename: Jian-Chao
authors.initials: JC
authors.lastname: Wu
authors.forename: Wen-Kui
authors.initials: WK
authors.lastname: Dong
authors.forename: Shang-Sheng
authors.initials: SS
authors.lastname: Gong
authors.forename: Jun-Feng
authors.initials: JF
authors.lastname: Tong