Electron spin distribution and molecular dynamics of aromatic hydrocarbon radical anions studied by¹H and²D N.M.R.

Abstract

The 1H N.M.R. spectra of the anions of anthracene, pyrene and triphenylene and the ~D N.M.R. spectra of the anions of anthracene-dlo and partly, randomly deuterated triphenylene have been measured in ethereal solutions. The hyperfine splitting constants derived from the measured Fermi contact shifts are presented and compared with E.S.R. data and predictions from theory. From the measured 1H and 2D linewidths the electron spin and rotational correlation times have been calculated. It is shown that the derived rotational correlation times are not very sensitive to anisotropic rotation.