title: [Zn7{(2-C5H4N)CH(OH)PO3}6 (H2O)6]SO4 x 4H2O: a zinc phosphonate cluster with a drum-like cage structure.
abstract: Direct reaction of hydroxy(2-pyridyl)methylphosphonic acid with zinc sulfate under hydrothermal conditions results in the formation of the novel heptanuclear cluster compound [Zn7{(2-C5H4N)CH(OH)PO3}6 (H2O)6]SO4 x 4H2O (1). The inorganic core of the cluster can be described as a cylindrical drum made up of six Zn atoms bridged by six {CPO3} units that is centered by a seventh Zn atom. Crystal data: monoclinic, C2/c, a = 22.690(2) A, b = 16.675(2) A, c = 18.151(2) A, beta = 93.390(2) degrees.
authors.affiliation: State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Nanjing University, Nanjing 210093, PR China.
authors.forename: Deng-Ke
authors.initials: DK
authors.lastname: Cao
authors.forename: Yi-Zhi
authors.initials: YZ
authors.lastname: Li
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Zheng