High-resolution IR spectroscopy of jet-cooled CF3CH2F

Don McNaughton, Corey Evans, Evan G. Robertson

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Abstract

The mid-IR spectrum of HFC-134a, CF3CH2F, entrained in a supersonic jet expansion has been measured at high and low resolution and the rotational structure of the C-type bands ν14 (1204 cm-1) and ν15 (974 cm-1) has been analysed along with the hot band ν15 + ν18 ← ν18. Rotational constants have been obtained and used to simulate the band structure, enabling the rotational temperature in the jet to be estimated at 65 K. In addition, low-resolution far-IR spectra of CF3CH2F in a room-temperature gas cell have been recorded and the vibrational fundamentals more completely assigned. These results are compared with previous experimental values and those predicted from molecular orbital calculations.

Original languageEnglish
Pages (from-to)1723-1728
Number of pages6
JournalJournal of the Chemical Society - Faraday Transactions
Volume91
Issue number12
DOIs
Publication statusPublished - 1 Dec 1995

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