15min:

G. LI, R. S. RAM, R. J. HARGREAVES, Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK; P. F. BERNATH, Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529 USA; Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK; AND H. LI, State Key Lab of Theoretical and Computational Chemistry, Jilin University, Changchun City, China, 130023.

The vibration-rotation spectra of HBO and HBS have been investigated at high resolution using a Fourier transform spectrometer. The HBO molecules were produced in a high temperature furnace from the reaction of H₂O vapor with boron by heating a mixture of crystalline boron and boron oxide (B₂O₃) at a temperature 1350^\circC. The spectra were recorded in the 1100--2200 cm^-1 and 1700--4000 cm^-1 wavenumber regions covering the ₃ and ₁ fundamentals, respectively. In total 24 vibrational bands involving 30 vibrational levels of H¹¹BO and 12 bands involving 18 levels of H¹⁰BO have been rotationally analyzed. After combining the existing microwave and infrared measurements, the absolute term values have been determined for a number of vibrationally-excited states of H¹¹BO and H¹⁰BO. \newline

The HBS molecules were formed by the reaction of CS₂ and water vapor with crystalline boron at a temperature 1300^\circC. The spectra were recorded in the 850--1500 cm^-1 and 1750--4000 cm^-1 wavenumber regions covering the ₃ and ₁ frequency regions. In total 29 vibrational bands involving 33 vibrationally-excited levels of H¹¹BS and 9 bands involving 12 vibrational levels of H¹⁰BS have been analyzed. The fitted spectroscopic parameters agree very well with the results of our ab initio calculations. L -resonance interactions observed between the 02⁰0 ( ) and 02²0 ( ) levels of HBO and HBS were analyzed using a 2×2 matrix to yield deperturbed constants.