Fig. 4. Top: ENDOR spectrum of triphenylmethyl radical (toluene, 200 K), center: EPR spectrum (toluene, 240 K), bottom: computer simulation and difference trace (below; obtained by subtraction of the simulated from the experimental spectrum.) The simulation was obtained by an automated analysis by means of programs EPRGEN and EPRFT, parameters after final refinement: HFCs 2.842 G (3 H), 2.602 G (6 H), 1.143 G (6 H), mixed Lorentz-Gauss lineshape (Lorentzian fraction 0.3), width 0.057 G.