title: Novel heterotetranuclear V2Mo2 or V2W2 complexes with 4,4'-di-tert-butyl-2,2'-bipyridine: syntheses, crystal structures, and catalytic activities.
abstract: Two novel heterotetranuclear complexes [V(2)O(2)(μ-MeO)(2)(μ-WO(4))(2)(4,4'-(t)Bubpy)(2)] (1) and [V(2)O(2)(μ-MeO)(2)(μ-MoO(4))(2)(4,4'-(t)Bubpy)(2)] (2) were synthesized, and the solid state structures of these complexes were revealed by single crystal X-ray crystallography. The heterotetranuclear complexes 1 and 2 are centrosymmetric building blocks, considered as consisting of two [VO(4,4'-(t)Bubpy)](3+) units bridged by μ-MO(4)(2-) (M = W or Mo) anions connected with methoxy groups. Furthermore, catalytic activities of 1 and 2 in the alcohol oxidation with hydrogen peroxide as terminal oxidants in water as solvent were investigated.
authors: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan.
authors: Shintaro
authors: S
authors: Kodama
authors: Akihiro
authors: A
authors: Nomoto
authors: Shigenobu
authors: S
authors: Yano
authors: Michio
authors: M
authors: Ueshima
authors: Akiya
authors: A
authors: Ogawa