Valorisation of Mixtures of Linear Alkenes using Cobalt-Mediated Isomerisation and Hydroformylation Chemistries
<p>Active catalysts derived from cobalt and the Xantphos ligand were synthesised, characterised and tested in the</p><p>hydroformylation of pure linear alkenes or their mixtures. The preformed complex [Co2(CO)6(Xantphos)] showed similar</p><p>reactivity and selectivity...
| Authors: | , , , , , |
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| Format: | article |
| Status: | Versión aceptada para publicación |
| Publication Date: | 2022 |
| Country: | España |
| Institution: | Universidad de Barcelona |
| Repository: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/225010 |
| Online Access: | https://hdl.handle.net/2445/225010 |
| Access Level: | Open access |
| Keyword: | Alquens Hidroformilació Cobalt Alkenes Hydroformylation |
| Summary: | <p>Active catalysts derived from cobalt and the Xantphos ligand were synthesised, characterised and tested in the</p><p>hydroformylation of pure linear alkenes or their mixtures. The preformed complex [Co2(CO)6(Xantphos)] showed similar</p><p>reactivity and selectivity towards aldehydes as the active catalyst formed in situ from equimolar amounts of [Co2(CO)8] and</p><p>Xantphos. In the case of oct-1-ene, the linear aldehyde was obtained with good chemo- and regio-selectivity (linear to</p><p>branched ratio was up to 75:25). For all octene isomers, tandem isomerisation-hydroformylation processes took place.</p><p>Regioselectivities for all the studied octene isomers remained practically constant, independently of the position or</p><p>geometry of the CC double bond in the starting material. Moreover, by-products were formed in similarly small amounts</p><p>for all the octene isomers. We also demonstrated that this chemistry is an interesting strategy for valorising mixtures of</p><p>linear hexenes, heptenes or octenes by transforming the initial mixture into one major aldehyde (addition of a CHO group</p><p>to the C1 carbon of the alkene skeleton, up to 73% selectivity). Moreover, these mixtures of alkenes were hydroformylated</p><p>with low final amounts of non-hydroformylated alkenes, hydrogenated alkenes and alcohols.</p> |
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