title: A remarkable member of the polyoxometalates: the eight-nickel-capped alpha-keggin polyoxoazonickelate.
abstract: The eight-nickel-capped polyoxoazonickelate, [Ni(20)(OH)(24)(MMT)(12)(SO(4))](NO(3))(2).6H(2)O (1; MMT = 2-mercapto-5-methyl-1,3,4-thiadiazole), has been synthesized, which has an alpha-Keggin structure with eight nickel caps. In this structure, the polyatom is the late transition metal Ni(II); the central heteroatom is S, and the organic terminal ligand becomes the primary part of the Keggin structure. This is a Keplerate-type cluster, which shows a central Ni(II)(12) cuboctahedron formed by the 12 Ni(II) centers of the classical alpha-Keggin core and a Ni(II)(8) hexahedron formed by the eight nickel caps.
authors: Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
authors: Lanjun
authors: L
authors: Dong
authors: Rudan
authors: R
authors: Huang
authors: Yongge
authors: Y
authors: Wei
authors: Wei
authors: W
authors: Chu