Kinetics of cyclopropyl radical reactions. 3. Study of some 1-substituted cyclopropyl radicals by EPR spectroscopy. The inversion barrier for 1-methylcyclopropyl

S Deycard, L Hughes, J Lusztyk…

Index: Deycard, S.; Hughes, L.; Lusztyk, J.; Ingold, K. U. Journal of the American Chemical Society, 1987 , vol. 109, # 16 p. 4954 - 4960

Full Text: HTML

Citation Number: 18

Abstract

Abstract: The 1-methyl-, 1-ethoxy-, and I-chlorocyclopropyl radicals have been observed by low-temperature EPR spectroscopy in" frozen" configurations in which the ring hydrogens that are syn and anti to the unpaired electron's orbital have different hyperfine splittings. The aH (syn)/aH (anti) ratios are 1.5 (CH,), 1.8 (EtO), and 1.9 (CI), all considerably lower than the ratio of ca. 3.3 found by Kawamura et al. 25 for methyl-substituted I-fluorocyclopropyl ...