Molybdenum (0) and tungsten (0) carbonyl N-heterocyclic carbene complexes as catalyst for olefin epoxidation

被引：17
作者：
Wang, Zhe [1 ]
Li, Shenyu [1 ]
Teo, Wei Jie [1 ]
Poh, Yu Ting [1 ]
Zhao, Jin [1 ,2 ]
Hor, T. S. Andy [1 ,2 ]
机构：
[1] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore
[2] Agcy Sci Technol & Res, Inst Mat Res & Engn, Singapore 117602, Singapore
来源：
JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2015年 / 775卷
关键词：
Molybdenum; Tungsten; N-heterocyclic carbene (NHC); Carbonyl; Olefin epoxidation catalysis; TRANSITION-METAL-COMPLEXES; C COUPLING REACTIONS; ORGANIC HYDROPEROXIDES; ALKYL HYDROPEROXIDES; LIGANDS; PRECURSORS; REACTIVITY; PALLADIUM(II); MONONUCLEAR; BIDENTATE;
D O I：
10.1016/j.jorganchem.2014.07.009
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A series of Mo(0) and W(0) carbonyl N-heterocyclic carbene (NHC) complexes containing monodentate NHC ligands with the formulae of M(CO) 4(NHC) 2 (NHC = IBz = 1,3-dibenzylimidazol-2-ylidene, M = Mo (1a), W (2a); NHC = (IPr)-Pr-n = 1,3-dipropylimidazol-2-ylidene, M = Mo (3), W (4a)) and M(CO)(5)(NHC) (NHC = IBz, M = Mo (1b), W(2b); NHC = InPr, M = W (4b); NHC = IMes = 1,3-bis(2,4,6-trimethylphenyl) imidazol-2-ylidene, M = Mo (5), W (6)) and the complexes containing chelating NHC ligands Mo(CO)(4)(PyNHC) (PyNHC = 3-methyl-1-picolylimidazol-2-ylidene (7)) and Mo(CO)(3)(Py2NHC) (Py2NHC = 1,3-dipicolylimidazol-2-ylidene (8)) have been synthesized and fully characterized. They show moderate catalytic activities towards cyclooctene epoxidation in the presence of tert-butyl hydroperoxide (TBHP). The stability of Mo-C-NHC bond under oxidative condition has been investigated. (C) 2014 Elsevier B.V. All rights reserved.
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收藏
页码：188 / 194
页数：7
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