Abstract
The infrared and Raman Spectra of saturated and unsaturated δ2-oxazolin-5-ones (azlactones) have been studied for CCl2, CHCl3, i-PrOH, and t-BuOH solutions and for the solid phase. Frequency assignments have been made for C=O bond stretching in the region 1825–1770 cm−1 and for a mixed C=C and C=N vibration at 1690–1550 cm−1. All of the azlactones showed an intense, characteristic absorption in a narrow range near 900 cm−1 which was assigned to a deformation vibration of the oxazolone ring.
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