Abstract
Abstract The 13C chemical shifts of 5-substituted polychlorobicyclo[2.2.1]heptene derivatives were determined. The chlorine, 5-endo and 5-exo substituent effects on the chemical shifts were discussed. The differences in the C3and C7 chemical shifts are shown to be helpful for the identification of the endo and exo isomers. A possible operation of the interaction of pi electrons with a carbon-chlorine dipole is also discussed.
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