Infrared Differentiation of the Mono, Bis, and Tris Perfluorophenoxy-s-Triazines

Abstract

The absorption bands in the region 1100–900 cm−1 permit reliable differentiation of the mono, bis, and tris perfluorophenoxy-s-triazines. Although fluoro-substituted alkoxy-s-triazines do not produce medium or strong bands in this range, one strong, sharp band is observed at 1000 cm−1 in the spectra of the solid 2-perfluorophenoxy-4, 6-bis (perfluoroalkoxy)-s-triazines. One strong band at 1000 cm−1 and a medium band near 980 cm−1 are observed in the spectra of the solid 2,4-bis (perfluorophenoxy)-6-perfluoroalkoxy-s-triazines. Three strong bands at 1000, 977, and 965 cm−1 are observed in the spectrum of solid 2,4,6-tris-(perfluorophenoxy)-s-triazine. Thus, the variation in the intensity and the number of bands in the range 1100–900 cm−1 is a function of the number of per-fluorophenoxy groups attached to s-triazine. Only two bands are observed in the spectra of liquid and dissolved samples, but the intensity of the band near 980 cm−1 remains a function of the number of per-fluorophenoxy groups attached to the C3N3 ring. These bands and those of other perfluorophenyl derivatives are compared in Table I.