The Infra-red Absorption of Some Organic Liquids

The infra-red absorption spectra of fourteen organic compounds, including seven alcohols and seven miscellaneous compounds, have been studied in the region from 1{μ} to 7.5{μ}. The bands in the region from 1{μ} to 3{μ} have been classified as overtones or combination bands of the assumed fundamental bands for the alcohols at about 3.00{μ}, 3.4{μ}, 6.8{μ}, and 9.8{μ}. By the use of Sappenfield's work for the region from 1{μ} to 2{μ} and that of Weniger from 7.5{μ} to 10{μ} and the present work a fairly complete idea of the infra-red absorption spectra of the alcohols has been obtained. The intensity relations have been discussed briefly and it was shown that they were in general in accordance with combinations attributed to the different bands. The bands of the miscellaneous organic compounds have been classified, but all the bands have not been included as only the fundamentals at 3.4{μ} and 6.8{μ} were used. A probable reason for the similarity of the infra-red spectra of many organic compounds in the region from 1{μ} to 3{μ} has been suggested.