Wednesday 10 October 2018, 1.00PM-2.00pm
Speaker(s): Dr Mark Crimmin, Imperial College London
Fluorocarbons surround us in modern life. These synthetic molecules find applications as refrigerants, aerosols and materials in homeware and electronic devices. The fluorocarbons market is expanding, and increasingly sophisticated methods are being developed to install fluorine into organic molecules. In contrast, the majority of natural fluorine containing substance are inorganic fluorides e.g cryolite [Na3AlF6] and fluorite [CaF2]. There is a clear need to develop methods to recycle and reuse fluorine containing organics. This requires new types of chemical transformation to be developed that break strong C–F bonds.
In this lecture, I will describe our recent advances using main group reagents based on aluminium and magnesium to break strong carbon–fluorine bonds of fluoroarenes, fluoroalkenes and fluoroalkanes. These reactions result in the formation of reactive organometallics that can be applied in synthesis. Aspects of the mechanisms of these new reactions have been investigated by a combination of kinetics and DFT calculations.[1-5]
. G. Coates, B. J. Ward, C. Bakewell, A. J. P. White, M. R. Crimmin, Chem. Eur. J. 2018, accepted for publication. DOI: 10.1002/chem.201804580
. C. Bakewell, A. J. P. White, and M. R. Crimmin Angew. Chem., Int. Ed. 2018, 57, 6638. DOI:10.1002/anie.201802321
. M. R. Crimmin, M. J. Butler, A. J. P. White Chem. Commun. 2015, 51, 15994 DOI: 10.1039/c5cc07140b