Abstract
THE recent statement by Kreevoy and Eyring1, based on theoretical considerations, that the hyperconjugation energy is approximately proportional to the number of α-hydrogen atoms, is supported by an empirical relation discovered independently during the course of other work. This shows that not only α-hydrogen atoms but also hydrogen atoms attached to β, γ and δ carbon atoms influence the hyperconjugation energy of olefines.
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References
Kreevoy, M. M., and Eyring, H., J. Amer. Chem. Soc., 79, 5121 (1957).
Conant, J. B., and Kistiakowsky, G. B., Chem. Rev., 20, 181 (1937).
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BEECH, S. Hyperconjugation due to Hydrogen Atoms in β γ and δ Positions. Nature 181, 1617–1618 (1958). https://doi.org/10.1038/1811617a0
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DOI: https://doi.org/10.1038/1811617a0
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