The Infra-red Absorption of Some Organic Liquids

Abstract

The infra-red absorption spectra of fourteen organic compounds, including seven alcohols and seven miscellaneous compounds, have been studied in the region from 1μ to 7.5μ. The bands in the region from 1μ to 3μ have been classified as overtones or combination bands of the assumed fundamental bands for the alcohols at about 3.00μ, 3.4μ, 6.8μ, and 9.8μ. By the use of Sappenfield's work for the region from 1μ to 2μ and that of Weniger from 7.5μ to 10μ 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 3.4μ and 6.8μ were used. A probable reason for the similarity of the infra-red spectra of many organic compounds in the region from 1μ to 3μ has been suggested.