Knowledge Bank

Vibration rotation spectra of HOC$\ell$ have been recorded using the Nicolet 7199 Fourier transform infrared spectrometer at Reading. Measurements were made at a resolution of $0.05cm-1$ to determine vibration rotation constants, and the 35-37 $C\ell$ isotope shifts in the vibration frequencies. The spectrum of DOC$\ell$ has also been recorded, and a preliminary analysis for the band origins has been made. The vibrational frequency data and centrifugal distortion constants have been used to determine the harmonic force field in a least squares refinement; the force field obtained also gives a good fit to data on the vibrational contributions to the inertial defect. The equilibrium rotational constants of HOC$\ell$ have been obtained, and an equilibrium structure has been estimated.