1,2,3-Dithiazolyl and 1,2,35-Dithiadiazolyl Radicals as Spin-Bearing ...

the proton two carbons away next to the ammonium group in the other direction. Finally
the signal farthest downfield is at a value of 9.17 ppm, which shifted substantially from
the value observed in the nitro compound indicating that this position is much more
deshielded than it was in the precursor compound.
5.4.5 X-ray Crystallography
X-ray crystallography quality crystals were obtained for V-15 by slow evaporation of
dioxane to give an inclusion compound with the recrystallization solvent. The unit cell
for this compound is shown in Figure 5-14 normal to the c axis. The solvent molecules fit
into channels walled by the molecules of the target species. The dihedral angle defined by
the two bridging carbon atoms and one from each of the linked rings, indicates the degree
Figure 5-20. Unit cell of V-15 showing the co-crystallized dioxane molecules as space-fill with the
dimerized molecule as wire-frame, illustrating the channels. Hydrogen atoms have been omitted.
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