Electron Paramagnetic Resonance Spectra of the Ground-State Triplet Diphenylmethylene and Fluorenylidene Molecules in Single Crystals

Abstract

The paramagnetic resonance spectra of the triplet ground states of diphenylmethylene and fluorenylidene molecules, oriented in single crystals, have been investigated. The fine structures and ¹³C hyperfine structures of these spectra have been studied and the parameters for best fit by a spin Hamiltonian have been determined. The implications of these results with respect to electron spin distribution and molecular structures have been examined.