Tetrafluordiazabuten-Derivate aus Chlorcyan

Cyanogenchloride reacts in liquid hydrogenfluoride with fluorides of some aliphatic hydrocarbons to yield derivatives of 2,4,4,4-tetrafluoro-1,3-diazabut-2-ene. The mechanism of its formation is explained in terms of an intermediate fluorinated linear dimerization product of cyanogenchloride. Reactions of the N-trifluoromethylgroup are reported.