Rate of degenerate rearrangement of the 2-methyl-2-norbornyl cation studied by13C selective pulse transfer and two-dimensional NOESY spectroscopy
作者:Peter Baine、Robert L. Domenick、Kenneth L. Servis
DOI:10.1002/mrc.1260251203
日期:1987.12
The rate of the degenerate 6,1‐hydride shift and rearrangement of the 2‐methyl‐2‐norbornyl cation has been determined using selective pulse transfer experiments and 2D NOESY experiments over the temperature range 200–220 K. Least‐squares analysis of the data gives a free energy of activation of 11.3 kcal mol−1. The results are compatible with the presence of σ‐delocalization in the 2‐methyl‐2‐norbornyl
Stabilities of carbocations in solution. 14. An extended thermochemical scale of carbocation stabilities in a common superacid
作者:Edward M. Arnett、Thomas C. Hofelich
DOI:10.1021/ja00347a060
日期:1983.5
Stabilities of carbocations in solution. 13. A leaving-group and solvent effect on the thermodynamics of carbocation formation in superacidic media
作者:Edward M. Arnett、Thomas C. Hofelich
DOI:10.1021/ja00376a054
日期:1982.6
Stabilities of carbonium ions in solution. 10. A thermochemical comparison of the relative stabilities of long-lived 2-norbornyl and butyl cations in sulfuryl chloride fluoride/antimony pentafluoride
作者:Edward M. Arnett、Norbert Pienta、Craig Petro
DOI:10.1021/ja00521a078
日期:1980.1
Deuterium isotope effects on the carbon-13 chemical shifts of carbocations