N,N-dichloro(chlorodifluoromethyl)amine having the following formula: CF2C1NC12, prepared by reacting cyanogen chloride with either chlorine monofluoride or perfluoromethyl hypochlorite. It belongs to a family of compounds useful as flame retardants, fumigants and polymerization initiators. It is also an intermediate in the preparation of other similarly useful perhalogenated products. For instance, it may be dechlorinated to yield N-chloro(difluoromethylene)imine, CF2=NCl, a new compound additionally useful as a source of the CF2=N. radical. Thus, this imine may be reacted with a stoichiometric quantity of tetrafluoroethylene to yield a new N-perhaloethyl(difluoromethylene)imine, CF2=NCF2CF2Cl, which is a stable heat transfer liquid and polymer solvent.