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

integrated to one proton apiece. The 1 H NMR for compound III-3 had quite a few
similarities consistent with the structure being largely unchanged. One of the primary
differences was the disappearance of the peak at δ = 10.65 associated with the hydroxyl
proton. In the aromatic region, the multiplet farthest downfield was shifted to 8.44,
consistent with the addition of an electron withdrawing acetyl group being substituted on
the adjacent ring. The other 2 peaks in this region were mostly unchanged, although it
should be noted that the resolution between the peaks and the relative intensities imply
that they may be doublets and so coupling constants were reported for each of these shifts
in the experimental section. There was also a new peak at δ = 2.37 ppm integrated to
three protons consistent with a methyl group adjacent to a carbonyl carbon.
Figure 3-1. 1 H NMR spectrum for III-3 in DMSO-d 6 at 300 MHz. There are some minor impurities.
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