1 / 6

Conversion of Carbon Dioxide into Methanol with Silanes over N-Heterocyclic Carbene Catalysts

Conversion of Carbon Dioxide into Methanol with Silanes over N-Heterocyclic Carbene Catalysts. Siti Nurhanna Riduan, Yugen Zhang,* and Jackie Y. Ying*. Angew. Chem. Int. Ed . 2009 , 48 , 3322 –3325. TON = 78~400 TOF = 2.8~17 h -1.

hina
Download Presentation

Conversion of Carbon Dioxide into Methanol with Silanes over N-Heterocyclic Carbene Catalysts

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Conversion of Carbon Dioxide into Methanol with Silanes overN-Heterocyclic Carbene Catalysts Siti Nurhanna Riduan, Yugen Zhang,* and Jackie Y. Ying* Angew. Chem. Int. Ed. 2009, 48, 3322 –3325

  2. TON = 78~400 TOF = 2.8~17 h-1 H. Koinuma, F. Kawakami, H. Kato, H. Hirai, J. Chem. Soc. Chem. Commun. 1981, 213. TON = 1840 TOF = 25.5 h-1

  3. Figure 1.13C NMR spectra from the reaction of 13CO2, diphenylsilane and Imes-CO2 catalyst 1 (5 mol%) in [D7]DMF. Proton-decoupled spectra are shown in (a), (b), and (d); the spectrum in (c) was recorded without proton decoupling. The spectra in (a) and (b) show the conversion of 13CO2 (*) to 13CH2(OSiR3)2 (▼) to 13CH3OSiR3 (#). The spectrum in (d) shows that all 13CO2 was converted to 13CH3OSiR3 24 h after additional silane was introduced to the mixture in (b).

  4. nucleophilic carbene would activate CO2 Si-H bond activated by a free carbene This catalytic cycle would continue until the supply of hydrosilane as a hydride donor is exhausted.

  5. DMF, as a Lewis base, will also activate silane and speed up the reaction

More Related