A dinuclear oxomolybdenum(VI) complex, [Mo<sub>2sub>O<sub>6sub>(4,4鈥?di-tert-butyl-2,2鈥?bipyridine)<sub>2sub>], displaying the {MoO<sub>2sub>(渭-O)<sub>2sub>MoO<sub>2sub>}<sup>0sup> core, and its use as a catalyst in olefin epoxidation
- 作者：Tatiana R. Amarante ; Patrí ; cia Neves ; Filipe A. Almeida Paz ; Martyn Pillinger ; Anabela A. Valente ; Isabel S. Gonç ; alves<sup> ; sup><sup>igoncalves@ua.ptsup>
- 关键词：Molybdenum ; Dinuclear complexes ; 4 ; 4&prime ; -di-tert-butyl-2 ; 2&prime ; -bipyridine ; Olefin epoxidation ; Crystal structure
- 刊名：Inorganic Chemistry Communications
- 出版年：2012
- 期刊代码：39_13877003
- 类别：ch
- 出版时间：June, 2012
- 卷：20
- 期：Complete
- 页码：147-152
- 文件大小：689 K
摘要
The dinuclear complex [Mo<sub>2sub>O<sub>6sub>(di-m>t m>Bu-bipy)<sub>2sub>] (<strong class="boldFont">1strong>) (di-m>t m>Bu-bipy = 4,4鈥?di-m>tert m>-butyl-2,2鈥?bipyridine) was obtained as a minor product of the hydrothermal reaction of MoO<sub>3sub> and di-m>t m>Bu-bipy, and structurally characterized by single-crystal X-ray diffraction. In the molecular structure of <strong class="boldFont">1strong> two distorted MoO<sub>6sub> octahedra share a common edge to form a dioxo-bridged Mo<sub>2sub>O<sub>6sub> unit which is coordinated by di-m>t m>Bu-bipy ligands. The catalytic performance of <strong class="boldFont">1strong> for the epoxidation of non-functionalized olefins using m>tert m>-butylhydroperoxide as oxidant compares favorably with that reported for other oxomolybdenum(VI) complexes bearing the same organic ligand. The catalyst exhibits regioselectivity toward internal olefin epoxidation over external olefin epoxidation.