Spectroscopic Comparison of the Proton-Attracting Properties of Liquids

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Abstract
The use of isotopic hydrogen has made possible an extension of the study of hydrogen bonds between unlike molecules to include many new types of donor solvents. From the magnitude of the shifts which the different solvents produce in the OD fundamental band of CH3OD, a comparison of the proton‐attracting properties of the different solvents can be made. It is suggested that this method may be used as a practical means of comparing the intrinsic strength of organic bases. Solvents representative of the classes—nitro‐compounds, esters, aldehydes, ketones, ethers, nitriles and amines—were employed, and the results give proof of the wide occurrence of hydrogen bonding between unlike molecules.