High resolution FTIR study of 34S16O2: The bands 2v3, 2v1 + v2 and 2v1 + v2 - v2

The high resolution infrared spectrum of the (34)s(16)O(2) molecule was recorded in the region of 2600-2810 cm(-1) where the strong 2v(3) band is located. About 2500 transitions with maximum values of quantum numbers J(max) = 76 and K-a(max.) = 26 were assigned to the 2v(3) band. The very weak 2v(1) + v(2) band was recorded and analyzed for the first time. This gave us the possibility to find and analyze, for the first time, the hot band 2v(1) + v(2) - v(2), which is located in the 2200-2380 cm(-1) region and totally covered by the strong 2v(1) band. In general, about 1370 transitions were assigned to the bands 2v(1) + v(2) and 2v(1) + v(2) - v(2), and 302 ro-vibrational energies of the (210) state were determined. Ro-vibrational energies obtained from experimental data for both the (002), and (210) vibrational states were used in the weighted list square fit of the parameters of the effective Hamiltonian, which takes into account additional interactions with the (130) and (050) vibrational states. The set of parameters obtained from the fit reproduces the initial experimental data with accuracies close to experimental uncertainties. (C) 2015 Elsevier Inc. All rights reserved.