Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p> Electrolytically generated semiquinone radical ions have been studied in the nematic mesophase of p-azoxyanisole by EPR methods. The degree of molecular ordering of benzo-, naphtho-, and anthrasemiquinones varied from 0.085, 0.18 to 0.20, respectively. The observed shifts of the hfs splitting constants and the g factors are in reasonable agreement with theoretical predictions. The negative sign of the C<jats:sub>1</jats:sub>
<jats:sup>13</jats:sup> splitting constant of benzosemiquinone has been confirmed. </jats:p>