Knowledge Bank

Molecular Beam Depletion Spectroscopy (MBDS) has been used to record the C-O stretching band of both $CH3OH/(CH3)2CO$ and $CH3OD/(CH3)2CO$. In each dimer, the hydroxy H/D of the methanol is hydrogen bonded to the oxygen of the acetone. Upon electron impact ionization and H/D transfer, the resulting protonated acetone ion is selected for detection by an off-axis quadrupole. A line tunable $CO2$ laser operating in the 9.6 $\mu$ P-branch region is used to dissociate the dimers. Spectral results for these mixed dimers will be presented and compared with earlier observations of the C-O stretching bands of $(CH3OH)2\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}$ and $(CH3OD)2.2$