Abstract

The infrared spectrum of propylene has been obtained under somewhat higher resolution than that used by previous workers. The improved resolution enables the assignment of many bands on the basis of the band types of the nearly symmetrical top. No important changes are made in existing assignments. The spectrum of propylene-d6 has been obtained. From an overtone band the unobserved torsional frequency is located at 174 cm−1 in propylene and at about 130 cm−1 in propylene-d6.

© 1953 Optical Society of America

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