THE NU(4) BAND OF FNO2

The high-resolution infrared spectrum of nitryl fluoride, FNO2, has be en observed in the 1750-1825 cm(-1) region. The spectrum displays exte nsive rotational structure consisting solely of b-type transitions and is assigned to nu(4), the NO2 antisymmetric stretching vibration. Ove r 1500 infrared and 51 microwave transitions have been fitted to gener ate rotational constants for the nu(4) = 1 state (nu(0) = 1793.466822 cm(-1)) and improved constants for the ground state. Rotationally reso lved infrared line positions are now available for the identification of FNO2, an atmospheric product of CFC and HFC oxidation. (C) 1997 Aca demic Press, Inc.