title: A novel three-dimensional copper(II) network via hydrogen bonds: diaquabis
abstract: The crystal structure of the title complex, [Cu(C(7)H(8)N(4))(2)(H(2)O)(2)](ClO(4))(2), consists of a discrete centrosymmetric [Cu(C(7)H(8)N(4))(2)(H(2)O)(2)](2+) cation and two perchlorate anions. The Cu(II) centre is six-coordinated by four N donors from the two pyrazole rings [Cu-N 1.998 (2) and 2.032 (3) A] and two O atoms from the water molecules occupying the apical sites [Cu-O 2.459 (3) A]. The coordination geometry of the complex can be described as octahedral. There is a unique three-dimensional network in which the perchlorate units are linked by a combination of strong O-H.O and weak C-H.O hydrogen bonds.
authors.affiliation: Department of Chemistry, Nankai University, Tianjin 300071, People's Republic of China. lzhang@nankai.edu.cn.
authors.initials: L
authors.lastname: Zhang
authors.initials: M
authors.lastname: Du
authors.initials: LF
authors.lastname: Tang
authors.initials: XB
authors.lastname: Leng
authors.initials: ZH
authors.lastname: Wang