title: Bis{(E)-2-eth-oxy-6-[2-(ethyl-ammonio)ethyl-iminometh-yl]phenolato}nickel(II) bis(perchlorate).
abstract: In the title centrosymmetric mononuclear nickel(II) complex, [Ni(C(13)H(20)N(2)O(2))(2)](ClO(4))(2), the Ni(II) atom is four-coordinated by the imine N and phenolate O atoms of the zwitterionic forms of two Schiff base ligands in a square-planar coordination geometry. In the crystal structure, mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds, forming chains running along the a axis.
authors.affiliation: Key Laboratory of Surface and Interface Science of Henan, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People's Republic of China.
authors.forename: Xue-Wen
authors.initials: XW
authors.lastname: Zhu
authors.forename: Xu-Zhao
authors.initials: XZ
authors.lastname: Yang