POLYHALOGENOAROMATIC COMPOUNDS .30. ELIMINATIONS OF MOLECULAR NITROGEN FROM TRICHLORO-1,2,4-TRIAZINE AND PERFLUOROTRI-ISOPROPYL-1,2,4-TRIAZINE

Fluorination of trichloro-1,2,4-triazine (2), using potassium fluoride at elevated temperatures is not a useful route to the corresponding trifluoro-derivative but reaction of (2) with hexafluoropropene and potassium fluoride gave perfluorotri-isopropyl-1,2,4-triazine (8). Pyrolysis of (2) in the vapour phase gave trichloroacrylonitrile and this is interpreted as evidence for an intermediate azete. Pyrolysis of (8) gave a mixture of (CF 3)2CFC≡CCF(CF3)2 (16) and (CF3)2 CFCN (17) while photolysis gave rearrangement to perfluorotri-isopropyl-1,3,5-triazine (18) as well as (16) and (17) by elimination of nitrogen.