3.6- Dimethyl-1,2-dithiin, structure

The structures of 1,4-dithiins such as dithieno[2,3- 3, 2 -f]-l,4-dithiin have been shown previously to be nonplanar they are folded along the S-S axis <1984CHEC(4)973>. Brisse et al. have shown that iV,iV -dimethyl-l,4-dithiin-l,2 4,5-tetracarboxamide 18 and its diselenine analogue are planar (Figure 3) <2000AXC190>. 

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