13C NMR spectra of polycyclic compounds: Stereochemistry of trimers of bicyclo[2.2.1]heptadiene

13C NMR spectra have been obtained for six isomers of bicyclo[2.2.1]heptadiene (norbornadiene) trimers, and a complete stereochemical assignment of these isomers has been made by means of a computer-assisted calculation of chemical shifts.