Inorganic Chemistry, Vol.43, No.24, 7570-7572, 2004
The first, discrete Zn-4 tetrahedron with a selenium atom in the center: X-ray structure and solution study of [Zn-4(mu(4)-Se){Se2P(OPr)(2)}(6)]
The first discrete, selenium-centered tetranuclear zinc cluster [Zn-4(mu(4)-Se){Se2P(OPr)(2)}(6)] was isolated and characterized. The cluster consists of six edge-bridged clsep ligands with four zinc atoms in a slightly distorted tetrahedron and a mu(4)-Se atom in the center. In addition, 12 mu(2)-bridging selenium atoms form a Se-12 icosahedron. From variable-temperature P-31 NMR studies, it was observed that the cluster [Zn-4(Se){Se2P(OPr)(2)}(6)] is partly decomposed to [ZnSe2P(OPr)(2)}(2)] and the monomeric species [Zn4Se2P(OPr)(2)}(2)] is further in equilibrium with its dimer [Zn{Se2P(OPr)(2)}(2)](2).