THE INFRARED SPECTRA OF TRIMETHYLAMINE OXIDE SALTS

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Abstract
Several salts of trimethylamine oxide have been prepared. A species common to all these salts, the (CH3)3NOH+ ion, has been inferred from the infrared spectra of the solids, but with varying degrees of interaction in the hydrogen bond [Formula: see text] depending on the anion. These variations have been investigated in detail, and with the help of deuterium replacement, confident assignments for the OH stretching, bending, and torsional modes have been made. A splitting of about 80 cm−1 in the bending mode has been noted, and has been ascribed to correlation field coupling. With one exception, the assignments are in good agreement with those previously determined by Giguère and Chin.

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