التفاصيل البيبلوغرافية
| العنوان: |
Molybdenum (0) and tungsten (0) carbonyl N-heterocyclic carbene complexes as catalyst for olefin epoxidation. |
| المؤلفون: |
Wang, Zhe1, Li, Shenyu1, Teo, Wei Jie1, Poh, Yu Ting1, Zhao, Jin1,2 chmzhaoj@nus.edu.sg, Hor, T. S. Andy1,2 andyhor@nus.edu.sg |
| المصدر: |
Journal of Organometallic Chemistry. Jan2015, Vol. 775, p188-194. 7p. |
| مصطلحات موضوعية: |
*MOLYBDENUM compounds, *TUNGSTEN catalysts, *CARBONYL compounds, *NITROGEN, *HETEROCYCLIC compounds, *CARBENES, *ALKENES, *EPOXIDATION |
| مستخلص: |
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 = I n Pr = 1,3-dipropylimidazol-2-ylidene, M = Mo ( 3 ), W ( 4a )) and M(CO) 5 (NHC) (NHC = IBz, M = Mo ( 1b ), W ( 2b ); NHC = I n Pr, 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 (Py 2 NHC) (Py 2 NHC = 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. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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