Finally Figure (e) shows the results for the dynamic calculation of the disordered super-cell DCI32a of Form I at 300 K. As with the static calculations shown in Figure (d), there are broad spectral features roughly centred around 50 cm -1 , 70 cm -1 and 100 cm -1 with fewer modes resolved than in the ordered systems. These modes are shifted to slightly lower frequencies, which is probably due to the introduction of anharmonicity compared with the static calculations, but the shifts are very small. Finally, as with the dynamics calculations in Figure (d) the integrated intensities are now much higher, in this case by a factor of nearly 4 compared to