Abstract
The vapor spectrum of 1,2,4-trifluorobenzene at 2810–2460 Å was obtained with a 3 meter grating in an Eagle mounting. The band at 37126 cm−1 was taken as the 0–0 band of the A′—A′ transition. The excited state vibrations 698, 746, 1274, and 1369 cm−1, which are totally symmetric, appear in progressions and combinations. Their correlation to vibrational modes is discussed. The 1274 belongs to a C—F bond stretching mode. Possibilities are discussed to explain the structure of the first group upon which the spectrum is built.
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