Fluorodiiodomethane is a trihalomethane with the chemical formula .
Fluorodiiodomethane can be obtained by the Finkenstein reaction of dibromofluoromethane with sodium iodide in acetone.
Also, iodoform reacts with mercuric fluoride at 120âÂÂðC to afford fluorodiiodomethane after distillation. This reaction is used to prepare large quantities of the reagent.
It is a highly efficient precursor of fluorocarbenes. The compound can generate fluorocarbenes that react with alkenes to give compounds containing fluorinated three-membered rings.
It is also a reagent for monofluorocyclopropanation.