Description:
<jats:title>Abstract</jats:title>
<jats:p> Well resolved spectra have been obtained from the radical anion of N-isopropylcarbazole (NIPCA). The splitting parameters have been evaluated by simulation of the spectrum. It is shown that in accordance with HMO calculations the spin density at the nitrogen atom is very small. The poorly resolved NIPCA<jats:sup>·+</jats:sup> spectrum points to a high spin density at the nitrogen atom. The mean square zero field splitting parameter of NIPCA is identical with that reported for carbazole.</jats:p>