title: 6,6'-Dihydr-oxy-2,2'-[(propane-1,3-diyl-dioxy)bis-(nitrilo-methyl-idyne)]diphenol.
abstract: The mol-ecule of the title compound, C(17)H(18)N(2)O(6), adopts a V-shaped conformation, the dihedral angle between the two halves of the mol-ecule being 81.31 (4) °. There is one half-mol-ecule in the asymmetric unit, with a crystallographic twofold rotation axis passing through the central C atom. There are strong intra-molecular O-H⋯N and O-H⋯O hydrogen bonds involving the hydr-oxy group and adjacent O and N atoms. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules, forming an infinite three-dimensional supra-molecular structure.
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: Xue-Ni
authors.initials: XN
authors.lastname: He
authors.forename: Yong-Hong
authors.initials: YH
authors.lastname: Guan
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.forename: Zong-Li
authors.initials: ZL
authors.lastname: Ren