Abstract

This paper presents infrared spectral data in the three micron region for ordinary and deuterium-substituted acetic, trichloroacetic, and trifluoroacetic acids. Series regularities are pointed out among the many submaxima appearing in the broad associated hydroxyl vibration band. The spacing between the submaxima for the heavy acids appears to be only one half that for the light acids. A critical discussion is given of various combination band hypotheses which have been proposed to explain the structure of the associated band. An alternative hypothesis is then suggested. This explanation postulates a series of regularly spaced positions of equilibrium of the hydrogen atom between the oxygen atoms in the O—H…O chain, these different positions corresponding to different quantized ground-state energy levels of the dimer molecule. It is suggested that the different members of a series of absorption submaxima might then be correlated with transitions to the first-excited state from the corresponding different ground states.

© 1953 Optical Society of America

Vibration-Rotation Bands and Molecular Structure of Allene

J. Overend and H. W. Thompson
J. Opt. Soc. Am. 43(11) 1065-1070 (1953)

The Infrared Spectrum of Brucite [Mg(OH)₂]*

R. T. Mara and G. B. B. M. Sutherland
J. Opt. Soc. Am. 43(11) 1100-1102 (1953)

The Spectrum of Nitrogen Dioxide in the 1.4–3.4μ Region and the Vibrational and Rotational Constants of the NO₂ Molecule*

Gordon E. Moore
J. Opt. Soc. Am. 43(11) 1045-1050 (1953)

Similarities in the Infrared Spectra of Homologous Compounds

Richard G. Fowler and Raymond M. Smith
J. Opt. Soc. Am. 43(11) 1054-1057 (1953)

Some Bands of Methyl Bromide in the Near Infrared under High Resolution*

D. H. Rank, H. D. Rix, and T. A. Wiggins
J. Opt. Soc. Am. 43(3) 157-162 (1953)