The Microwave Spectrum of Oxazole I. The Complete Structure by DRM Microwave Spectroscopy

Abstract

Double resonance modulation (DRM) microwave spectroscopy has been used to determine the complete substitution structure of oxazole. Isotopic species spectra associated with 13C, 15N and 18O were studied in their natural abundances, while the mono-deuterated species were examined in a mixture of slightly enriched forms. With uncertainties below 0.002 Å and 0.1° for distances and angles, respectively, the structure parameters of oxazole are as follows: [FORMULA OMITTED] The geometry of oxazole is compared with that of isoxazole and with the structures of the closely related compounds furan and 1,3,4-oxadiazole. © 1978, Walter de Gruyter. All rights reserved.