K. Kudo et al., NOVEL SYNTHESIS OF OXALATE FROM CARBON-DIOXIDE AND CARBON-MONOXIDE INTHE PRESENCE OF CESIUM CARBONATE, Journal of the Chemical Society, Chemical Communications, (6), 1995, pp. 633-634
In the presence of caesium carbonate 1, the direct reaction of CO2 (11
0 atm) with CO (20 atm) results in reductive capture of CO2 to give ca
esium oxalate 2 in good yield at elevated temperature (380 degrees C).