"Activating Carbon Monoxide and Carbon Dioxide with Organometallic Uranium Complexes- Closing the Carbon Cycle". Geoff Cloke. CPD Conference June 22 nd 2012. The Carbon Cycle. ~80 % of current global energy supply depends on fossil fuels End product of combustion is CO 2
CPD Conference June 22nd 2012
“Uncertainty in petroleum cost and supply demands that alternative sources of primary organic materials be developed. Carbon monoxide as a component of synthesis gas (H2 + CO) from coal and biomass will have a leading role in meeting these needs. ..........develop strategies that use CO as a two-carbon or larger building block to construct the organic materials needed for fuels and chemical manufacturing.”
Wayland, Science, 2006
Create C-C bonds and/or C-H bonds from CO or CO2
C≡O 1070 kJ/mol
O=C=O 800 kJ/mol
Uranium(III)- highly reducing
UIV/III: E½ = -2.18 V
E / volts
What to do with all the depleted uranium??!
O. T. Summerscales, F. G. N. Cloke, P. B. Hitchcock, J. C. Green, and N. Hazari,Science, 2006, 311, 829.
O. T. Summerscales, F. G. N. Cloke, P. B. Hitchcock, J. C. Green, and N. Hazari, J.Am.Chem. Soc, 2006, 128, 9602.The Next One in the Series- Squarate
+ Green, and N. Hazari,Carbon Dioxide Activation
A.S.P. Frey, O.T. Summerscales, F.G.N. Cloke, M.P. Coles, P.B. Hitchcock, Chem.Commun., 2009
Carbon Dioxide Activation 2 Green, and N. Hazari,
Nikos Tsoureas, unpublished results 2012
Chem. Eur. J.,2010, 16, 9305.
A.S. P. Frey, F. G. N. Cloke, M. P. Coles, L. Maron, and T. Davin, Angew. Chem. Int. Ed.2011, 50, 6881
Electrochemically- controlled potential electrolysis?