THE NU-2 AND NU-3 BANDS AND GROUND-STATE CONSTANTS OF OCLO

The Fourier Transform IR spectra of the ν2 and ν3 bands of ClO2 (OClO) have been recorded at ∼0.005 cm-1 resolution. Both bands have been analyzed in terms of a rotation-spin-rotation Hamiltonian model, including up to sextic centrifugal distortion constants and spin-rotation centrifugal distortion parameters. More than 4300 transitions belonging to these bands have been assigned for either the 35Cl or 37Cl species. Accurate values for the band origins and the rotational and spin-rotation parameters of the v2 = 1 and v3 = 1 states have been obtained from this data set. Ground state combination differences from all three fundamental bands of this molecule, plus ground state microwave data, have been used to improve the ground state constants. A list with the assigned transitions of ν3 and their calculated intensities is given. © 1992.