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Summary: 3004 J. Org. Chem., Vol.42, No. 18, 1977 Apeloig, Schleyer, and Pople
Am. Chem. SOC.,97, 1754 (1975).
(22) After this work was completed,Westermanand Robertsreported effects
of steric inhibition of conjugation on the nitrogen shifts of enamines:P.
Westerman and J. D. Floberts, J. Org. Chem.,42, 2249 (1977). Their trends
agree with our observations.
(23) M. Karplusand J. A. Pople,J. Chem. Phys., 38, 2803 (1963).
(24) D. G.Streets, W. E. tiall, and G. P. Ceasar, Chem. Phys. Lett., 17, 90
(1972).
(25) The correlation coefficient is improved ( r = 0.97) if aniline is excluded
(26) A. D. Baker, M. Brisk, and M. Gellender, J. Nectron Specfrosc. Relat.
(27) J. B. Lambert,G. Binsch,andJ. D. Roberts,Proc. Natl. Acad. Sci. U S A ,
(28) W. M. Litchman,J. Magn. Reson., 12, 182 (1973).
(29) M. P. Sibi and R. L. Lichter, unpublished results.
arbitrarily from the data.
phenom., 3, 227 (1974).
51, 735 (1964).
Molecular Orbital Theory of the Electronic Structure of Molecules. 36.
A Theoretical Study of Several a-Substituted Vinyl Cationsla
Y. Apeloig,lbP. v. R. Schleyer,*lcand J. A. Popleld
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