THE INFRARED ABSORPTION SPECTRA OF DEUTERATED ESTERS: I. METHYL ACETATE

Abstract

By comparison of the infrared absorption spectrum of methyl acetate with the spectra of three deuterium substitution products, it has been possible to assign the bands in the 3100–2800 cm.−1 and 1500–1300 cm.−1 regions of methyl acetate to vibrations localized in the individual methyl groups. Bands characteristic of the individual trideuteromethyl groups are also identified between 2300 and 2000 cm.−1. The C=O stretching frequency is observed to shift to lower frequency with increasing deuteration. The spectra in the range 1300–700 cm.−1 are also reported.