Stable carbocations. CLXXX. Carbon-13 and proton nuclear magnetic resonance spectroscopic study of phenyl-, methyl-, and cyclopropyl-substituted alkenyl (allyl) …

GA Olah, RJ Spear

Index: Olah,G.A.; Spear,R.J. Journal of the American Chemical Society, 1975 , vol. 97, # 6 p. 1539 - 1546

Full Text: HTML

Citation Number: 87

Abstract

Abstract: Two series of methyl-, cyclopropyl-, and phenyl-substituted alkenyl (allyl) cations have been studied by I3C NMR and 'H NMR spectroscopy under stable-ion conditions. The 1, 3-substituted alkenyl cations (3a-f) exclusively adopt the trans, trans conformation and exhibit strong charge delocalization between C, and C3, whereas the charge in the 1, l- substituted alkenyl cations (4a, 4b, and 4d-f) is substantially higher at CI, the tertiary ...