High-resolution rotational analysis of the lowest D-O overtone bands of deuterated hypochlorous acid: 2 nu(1) and 3 nu(1)

The high-resolution Fourier transform spectrum of the (DOCl)-Cl-35 molecule was recorded and analyzed in the region of the two lowest D-O overtone ban ds, 2 nu (1) and 3 nu (1). Because of the presence of strong resonance inte ractions, the influence of the (130) state on the (200) state, and also tha t of the (221). (230) states on the (300) sate, was taken into account. Tra nsitions belonging to the 2 nu (1) and 3 nu (1) bands were assigned up to J (max) = 35 in both cases. The sets of spectroscopic parameters and resonanc e coefficients obtained from the fit reproduce the "experimental" rovibrati onal energies of the (200) and (300) vibrational states with accuracies clo se to experimental uncertainties. (C) 2001 Academic Press.