Substituent Effects on the Populations of Rotational Isomers in 9-Benzyl-8,13-dichloro-1-methyltriptycenes. Evidence for the Presence of CH3...? Interaction

Article abstract of DOI:10.1246/cl.1987.89

Examination of population ratios, +/- sc/ap, in substitued 9-benzyl-8,13-dichloro-1-methyltriptycene derivatives by 1H-NMR spectroscopy has shown that the ratio becomes larger as the substituent in the benzyl group is more electron-donating and as that in