Spectroscopic study demonstrates hindered internal rotation energy barriers in 2,6-di-t-butyl-4-alkylphenoxyl radicals, indicating substituent effects on molecular motion.
ESR or ENDOR spectra were observed for the 2,6-di-t-butyl-4-methyl-, 4-ethyl-, 4-isopropyl-, and 4-cyclohexylphenoxyl radicals. From the analyses of the temperature dependence in β-proton splittings, the energy barriers to internal rotation of the alkyl group were estimated.
No takes yet. Share an insight, caveat, or question.
Shimoda et al. (1979) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: