A study of the uv spectra of a series of conformatially rigid p-nitrophenylcyclopropanes and the parent hydrocarbons demonstrates t, he existence of a slight stereochemical bias for electronic interaction between the cyclopropyl group and the nitrobenzene or benzene chromophore. In the series studied, the orientation of the cyclopropane ring deviates from the bisected geometry from 0 to 90".
