THE HIGH-RESOLUTION INFRARED-SPECTRUM OF THE NU(1) 2(NU)(2) FERMI DYAD BANDS OF COF2/

High-resolution FTIR data of carbonyl fluoride in the region of the C- O stretch vl fundamental have been analyzed. Satisfactory interpretati on of the spectral data required a rigorous analysis that involved the inclusion of Fermi resonance with the 2 nu(2) state and Coriolis inte raction with the 2 nu(3) + nu(6) dark state. Deperturbed molecular con stants for the three interacting states as well as perturbation parame ters that fit the data within the limits of the experimental accuracy of similar to 0.00035 cm(-1) have been obtained. Interesting evidence of ''axis interchange'' in the 2 nu(2) state has been observed. (C) 19 97 Academic Press.