Knowledge Bank

o$-$, $m-$, and p-cresols have been studied in the vapor phase between temperatures of $140\circ C$ and $200\circ$C. Most of the infrared vibrational bands can be assigned on the basis of extensive previous work on benzene derivatives in condensed phases. The region studied lies between 4000 and 400 cm $\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ and the results are compared with liquid phase laser Raman spectra of the compounds.