Hyperfine Structure in the Solution ESR Spectrum of Di-tert-butyl Nitroxide

Isotropic splitting constants for 14N, 15N, 13C, and 17O nuclei present in natural abundance in di-t-butyl nitroxide have been measured by electron spin resonance, using benzene solutions at room temperature. The proton hyperfine structure was not resolved, but was estimated from best-fitting computer-simulated spectra. Comparison of computer-simulated single- and double-substitution 13C satellites with the experimental satellites indicates that only six of the eight positions contribute to these satellites.