title: 6,6'-Dieth-oxy-2,2'-[propane-1,3-diyl-dioxy-bis(nitrilo-methyl-idyne)]diphenol.
abstract: The complete mol-ecule of the title compound, C(21)H(26)N(2)O(6), is generated by a crystallographic twofold axis and adopts a trans configuration with respect to the azomethine group. The two benzene rings are almost perpendicular to one another, making a dihedral angle of 89.53 (3)°. In the mol-ecular structure, pairs of intra-molecular O-H⋯N hydrogen bonds generate two six-membered rings. The crystal structure is further stabilized by inter-molecular C-H⋯O hydrogen bonds, which link four adjacent mol-ecules into a network structure.
authors.affiliation: School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Yin-Xia
authors.initials: YX
authors.lastname: Sun
authors.forename: Jun-Feng
authors.initials: JF
authors.lastname: Tong