Vibrational analysis of ethyl and n-propyl fluorides

Infrared spectra of n-propyl fluoride in the gas and solid states were obtained that confirm the presence of two molecular conformations in the gas and unannealed solid. Only one conformation identified as the gauche form is present in the annealed solid. Raman spectra were obtained for the solid. Normal coordinate calculations were made simultaneously for ethyl fluoride, gauche n-propyl fluoride, and trans n-propyl fluoride, and the resulting force constants and vibrational assignments are given.