Dithiadiazole

In both cases, the neutral species are radicals that are of interest as examples of paramagnetic heterocycles.

They have also attracted interest because of the tendency of the neutral species to form linear chain compounds, a theme in molecular electronics.

The neutral species' slight dipole moment places a positive charge on the sulfur atoms.

Alternatively, sulfur dichloride reacts with amidines to give dithiadiazolium chlorides, albeit with sensitivity to reaction conditions.

[4]: 206–209 The singly-reduced dithiazole radical is unstable, isomerizing to 1,2‑dithia-3,5‑diazole or forming uncharacterized brown polymers.

Part of the structure of 1,2‑dithia-3,5‑diazole highlighting the stacking motif common for these compounds. [ 1 ] Color code: yellow = S, blue = N, gray = C.
Bond distances and bond angles of 1,3- [ 2 ] and 1,2-dithiadiazolium cations. [ 3 ] Distances in picometers .
Molecule of 4,4 ′ -bis(1,2,3,5-dithiadiazolyl) (BDTDA)
BDTDA honeycomb lattice on copper, STM image