Knowledge Bank

The infrared spectra of ethane molecules embedded in He droplets have been studied via depletion spectroscopy in the $\nu$ = 2880-3000 cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ spectral range. Four features observed in the spectra are assigned as the $\nu$$\mathrm{<mrow\; data-mjx-texclass="ORD">5</mrow>}$, $\nu$$\mathrm{<mrow\; data-mjx-texclass="ORD">8+11</mrow>}$(perpendicular and parallel components), and $\nu$$\mathrm{<mrow\; data-mjx-texclass="ORD">7</mrow>}$ vibrational bands. Band origins and rotational constants for ethane in He are obtained and compared with corresponding gas phase values. Spectra of large ethane clusters (C$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}$H$\mathrm{<mrow\; data-mjx-texclass="ORD">6</mrow>}$) (with $\backslash italicizen$ = 1300-13000) in He are also reported.