Hydrogenation of 1-hexene by a triruthenium cluster stabilized with a face-capping 1,3-dithiacyclohexane ligand
✍ Scribed by K.O. Kallinen; T.T. Pakkanen; T.A. Pakkanen
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 399 KB
- Volume
- 99
- Category
- Article
- ISSN
- 1381-1169
No coin nor oath required. For personal study only.
✦ Synopsis
Homogeneous hydrogenation of 1-hexene to hexane was studied using a triruthenium cluster containing a face-capping ligand, HRu,(CO)g(~X-~3-l,3-dithiacyclohexane) (l), as a catalyst precursor. The catalytic activity of 1 was studied as a function of temperature (98-14O"C), H2 pressure ( IO-60 bar) and catalyst concentration. The highest hydrogenation rate of 0.085 mol/h was measured at 141°C and 60 bar of H2 pressure. A linear dependence between the catalytic activity of 1 and the H, pressure was observed in the pressure range of 10-50 bar, but equalizing at higher pressures ( > 50 bar). A rise in the temperature causes an increase in catalytic activity but at the same time enhances the fragmentation of 1 and the formation of a brown precipitate.
The fragmentation product was not active in hydrogenation but shows moderate isomerization activity. A possible mechanism for the hydrogenation of I-hexene by 1 is presented.