Dithiin

Dithiins /daɪ.ˈθaɪ.ɪnz/ are a class of heterocyclic compounds, with the parent members having the formula (C2H2)2S2. Two isomers of this parent are recognized, 1,2- and 1,4-dithiins. Planar dithiins are 8π e− systems, which would lead to antiaromaticity if the structure was planar. Akin to the behavior of cyclooctatetraene, they instead adopt nonplanar structures. Vinyldithiin, a common component of garlic, is a misnomer for 3-vinyl-4H-1,2-dithiin. 1,3-dithiins are unknown.

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