A dinuclear oxomolybdenum(VI) complex, [Mo₂O₆(4,4鈥?di-tert-butyl-2,2鈥?bipyridine)₂], displaying the {MoO₂(渭-O)₂MoO₂}⁰ core, and its use as a catalyst in olefin epoxidation

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• 作者：Tatiana R. Amarante ; Patrí ; cia Neves ; Filipe A. Almeida Paz ; Martyn Pillinger ; Anabela A. Valente ; Isabel S. Gonç ; alves ; ^{igoncalves@ua.pt}
• 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 [Mo₂O₆(di-tBu-bipy)₂] (Font">1) (di-tBu-bipy = 4,4鈥?di-tert-butyl-2,2鈥?bipyridine) was obtained as a minor product of the hydrothermal reaction of MoO₃ and di-tBu-bipy, and structurally characterized by single-crystal X-ray diffraction. In the molecular structure of 1 two distorted MoO₆ octahedra share a common edge to form a dioxo-bridged Mo₂O₆ unit which is coordinated by di-tBu-bipy ligands. The catalytic performance of 1 for the epoxidation of non-functionalized olefins using tert-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.