title: (Dicyanamido)[tris-(2-pyridylmeth-yl)amine]zinc(II) perchlorate.
abstract: In the title complex, [Zn(C(2)N(3))(C(18)H(18)N(4))]ClO(4), the Zn(II) ion has a slightly distorted trigonal-bipyramidal ZnN(5) coordination geometry. The crystal structure is stabilized by weak inter-molecular C-H⋯O and C-H⋯N hydrogen bonds. In addition, there are relatively close contacts between the O atoms of the perchlorate anion and symmetry-related pyridine rings [O⋯Cg = 3.179 (3) and 3.236 (3) Å, where Cg is the centroid of a pyridine ring], and between the terminal N atom of the dicyanamide ligand and pyridine rings [N⋯Cg = 3.381 (4)-3.761 (3) Å]. The central N atom of the dicyanamide ligand is disordered over two sites in an approximately 0.6:0.4 ratio.
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.forename: Hong Yan
authors.initials: HY
authors.lastname: Zhao
authors.forename: Shi Guo
authors.initials: SG
authors.lastname: Zhang