# Mechanism for Synthesis of Tetranitromethane from Acetic Anhydride and Fuming Nitric Acid

In my undergraduate Mechanisms-class the formation of tetranitromethane from acetic Anhydride with fuming $$\ce{HNO3}$$ was listed as optional knowledge in a chapter about the reactions of enols, enamines, etc. I can't find it in my notes or in the recommended literature, neither can I find information on molbase, and the two papers I can find, the original 1910 synthesis and This, are not mentioning any reaction mechanism.

I guess it somehow decomposes at the stage when the acetic anhydride is tri-substituted on one side, and somewhere there is a trinitromethane-anion involved which forms the product with $$\ce{NO2+}$$?

• Yeah, probably something like that. – Mithoron Aug 4 '19 at 19:48