The Raman Spectra of Certain Organic Liquids

The Raman spectra of nineteen organic compounds chosen from different chemical series have been measured. Frequency shifts are given and a relationship is shown between certain frequency shifts and molecular structure. In particular the frequency shift $\Delta \nu =1024\mathrm{}$ ${\mathrm{cm}}^{-1\mathrm{}}$ recurs with the C — C structure, likewise $\Delta \nu =1613\mathrm{}$ ${\mathrm{cm}}^{-1\mathrm{}}$ is associated with C = C, $\Delta \nu =1446\mathrm{}$ ${\mathrm{cm}}^{-1\mathrm{}}$ with $\left\{\mathrm{H}\right\}\left\{\right|\left\}\right\{-\mathrm{C}-\left\}\right\{\left|\right\}\left\{\mathrm{H}\right\}$, $\Delta \nu =2929\mathrm{}$ ${\mathrm{cm}}^{-1\mathrm{}}$ with $\left\{\mathrm{H}\right\}\left\{\right|\left\}\right\{\mathrm{H}-\mathrm{C}-\mathrm{C}\left\}\right\{\left|\right\}\left\{\mathrm{H}\right\}$ and $\Delta \nu =3054\mathrm{}$ ${\mathrm{cm}}^{-1\mathrm{}}$ with $\mathrm{H}-?$. It is suggested that anti-Stokes lines may have slightly greater frequency shifts than the corresponding Stokes lines. A comparison between Raman frequency shifts and infrared absorption data is made.