FT-IR Study of the Perpendicular Bands of 1,3,5-Triazine I:* The v₇ and v₉ Bands of ¹²C₃ ¹⁴N₃H₃ , ₁₃C^{3 14}N₃H₃, ¹²C₃ ¹⁵N₃H₃ and the Difference Band v₉-v₁₄ of ¹²C^{3 14}N₃H₃

Abstract

Abstract The analysis of the high resolution FT-IR spectra of the perpendicular bands v 7 (E') at about 1550 cm -1 and V 9 (E') at about 1170 cm -1 of the isotopomers 12 C 3 14 N 3 H 3 , 13 C3 14 N 3 H 3 , and l2 C 3 I5 N 3 H 3 is given. Both bands proved to be free from accidental resonances. The molecular constants of the state v 7 = 1 and v 9 = 1 of the isotopomers under consideration are listed. The weak difference band v 9 -v l4 (E" → E') of 12 C 3 14 N 3 H 3 was recorded and analyzed, using the molecular constants of v 9 = 1 [this work] and V 14 = 1 [of 1995], This analysis proves the quality of the molecular constants of the fundamental v 14 which is IR-inactive.