HIGH-RESOLUTION FOURIER-TRANSFORM INFRARED-SPECTROSCOPY OF NITROSYL FLUORIDE

The high-resolution FTIR spectrum of FNO has been recorded and the rov ibrational structure of the essentially unperturbed nu 3, 2 nu(3), and nu(1) + nu(3) cold bands and the 2 nu(3) <-- nu(3), + nu(3) <-- nu(3) , and nu(1) + nu(2) + nu(3) <-- v(3) hot bands has been analyzed. The perturbed bands nu(1) and nu(1) + nu(2) have been assigned and the dat a analyzed by fitting the transitions with the dark states nu(2) + 2 n u(3) and 2 nu(2) + 2 nu(3). Parameters for both light and dark states together with Coriolis coupling parameters have been determined. (C) 1 998 Academic Press.