title: Bis(2,3-dimethyl-butane-2,3-diamine)nickel(II) dinitrate monohydrate.
abstract: In the title compound, [Ni(C(6)H(16)N(2))(2)](NO(3))(2)·H(2)O, the bis-(2,3-dimethyl-butane-2,3-diamine)nickel(II) complex cation possesses a relatively undistorted square-planar geometry about the Ni atom, which lies on an inversion centre and is coordinated by four N atoms from two symmetry-related 2,3-diamino-2,3-dimethyl-butane (tmen) ligands. The amine groups are N-H⋯O hydrogen bonded to the nitrate anions, which are, in turn, linked by inter-stitial water mol-ecules lying on a twofold axis. The infinite zigzag chains thus formed along [001] are further connected to each other by N-H⋯O hydrogen bonds towards the water mol-ecules, forming layers of two-dimensional hydrogen-bonded arrays.
authors.affiliation: School of Chemistry & Pharmaceutical Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan 643000, People's Republic of China.
authors.forename: Shen-Xin
authors.initials: SX
authors.lastname: Li
authors.forename: Li-Ke
authors.initials: LK
authors.lastname: Zou
authors.forename: Bin
authors.initials: B
authors.lastname: Xie
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Jian-Zhang
authors.initials: JZ
authors.lastname: Li