Production of HCOOH/NEt₃ Adducts by CO₂/H₂ Incorporation into Neat NEt₃

Adding HCOOH to NEt3 gives a biphasic system of amine and an adduct with a molar acid/amine ratio (AAR) of 1.33. In the presence of a suitable catalyst, CO2/H2 (1:1) acts as HCOOH if both amine and 1.33-adduct phases are present. For example, at 40 °C and 120 bar, neat amine, “doped” with both 1.33 adduct and catalyst, is quantitatively converted into 1.78 adduct, which is distilled as an azeotrope with AAR=2.35. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.