title: The first, discrete Zn4 tetrahedron with a selenium atom in the center: x-ray structure and solution study of [Zn4(mu4-Se)[Se2P(OPr)2]6].
abstract: The first discrete, selenium-centered tetranuclear zinc cluster [Zn4(mu4-Se)[Se2P(OPr)2]6] was isolated and characterized. The cluster consists of six edge-bridged dsep ligands with four zinc atoms in a slightly distorted tetrahedron and a mu4-Se atom in the center. In addition, 12 mu2-bridging selenium atoms form a Se12 icosahedron. From variable-temperature 31P NMR studies, it was observed that the cluster [Zn4(Se)[Se2P(OPr)2]6] is partly decomposed to [Zn[Se2P(OPr)2]2] and the monomeric species [Zn[Se2P(OPr)2]2] is further in equilibrium with its dimer [Zn[Se2P(OPr)2]2]2.
authors.affiliation: Department of Chemistry, Chung Yuan Christian University, Chung-Li, Taiwan 320, ROC.
authors.forename: Bidyut Kumar
authors.initials: BK
authors.lastname: Santra
authors.forename: Chiu-Mine
authors.initials: CM
authors.lastname: Hung
authors.forename: Ben-Jie
authors.initials: BJ
authors.lastname: Liaw
authors.forename: Ju-Chun
authors.initials: JC
authors.lastname: Wang
authors.forename: C W
authors.initials: CW
authors.lastname: Liu