Knowledge Bank

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 H$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}$O vapor with boron by heating a mixture of crystalline boron and boron oxide (B$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}$O$\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}$) at a temperature $\sim$1350$^irc}$C.Thespectrawererecordedinthe1100--2200cm$^{-1}$ and 1700--4000 cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ wavenumber regions covering the $\nu 3$ and $\nu 1$ fundamentals, respectively. In total 24 vibrational bands involving 30 vibrational levels of H$\mathrm{<mrow\; data-mjx-texclass="ORD">11</mrow>}$BO and 12 bands involving 18 levels of H$\mathrm{<mrow\; data-mjx-texclass="ORD">10</mrow>}$BO 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 H$\mathrm{<mrow\; data-mjx-texclass="ORD">11</mrow>}$BO and H$\mathrm{<mrow\; data-mjx-texclass="ORD">10</mrow>}$BO.\newline The HBS molecules were formed by the reaction of CS$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}$ and water vapor with crystalline boron at a temperature $\sim$1300$^irc}$C.Thespectrawererecordedinthe850--1500cm$^{-1}$ and 1750--4000 cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ wavenumber regions covering the $\nu 3$ and $\nu 1$ frequency regions. In total 29 vibrational bands involving 33 vibrationally-excited levels of H$\mathrm{<mrow\; data-mjx-texclass="ORD">11</mrow>}$BS and 9 bands involving 12 vibrational levels of H$\mathrm{<mrow\; data-mjx-texclass="ORD">10</mrow>}$BS have been analyzed. The fitted spectroscopic parameters agree very well with the results of our \textit{ab initio} calculations. \textit{L}-resonance interactions observed between the 02$^{0}$0($\Sigma$)and02$^{2}$0($\Delta$)levelsofHBOandHBSwereanalyzedusinga2$\times$2 matrix to yield deperturbed constants.