Figure 8
Orientation C for the DMSO molecule in the form I structure at 120 K. The arrows indicate the directions of the S—CH3 bond vectors: one is equivalent to orientation A (Fig. 6), while one is distinct, pointing between TFDIP molecules. Due to the local mirror symmetry, two locally equivalent orientations are possible for the DMSO molecule, pointing either to the left or to the right in the diagram; these orientations alternate for neighbouring molecules along the c axis (Fig. 4). |