Quartz Ultraviolet Rydberg Transitions in Benzene Isomers

Investigation of the matrix isolation and high-pressure perturbation spectra of the benzene isomers, benzvalene, Dewar benzene and fulvene, has shown conclusively that the structured regions in the absorption spectra of these molecules around 200 nm are due not to valence shell transitions but rather are Rydberg transitions to 3s type states. In the light of the experimental evidence reassignments of the spectra of each of these molecules have been proposed.