Symmetry Classification of the Energy Levels of Some Triarylmethyl Free Radicals and Their Cations

The absorption and luminescence spectra of triphenylmethyl, tri‐p‐xenylmethyl, phenyl‐di‐p‐xenylmethyl, diphenyl‐p‐xenylmethyl, and their cations have been determined. Polarization of the luminescence of each substance under excitation by plane polarized light has been examined. Assignment of symmetry classifications to the energy levels of these substances has been attempted.