Conformational energies of C4F9OC2H5 (HFE-7200)

► We have studied a large, conformationally complex molecule C4F9OC2H5, using chirped pulse Fourier transform microwave spectroscopy. ► The rapid spectral measurements and reliable, relative transition intensities have enabled four species to be identified amongst the very dense spectra. ► Calculations have assisted in the identification of these species.