Dithiin

Dithiin is 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. These compounds are antiaromatic consisting of 8π e systems, akin to cyclooctatetraene. Vinyldithiin, a common component of garlic, is a misnomer for 3-vinyl-4H-1,2-dithiin, since true 1,3-dithiins are unknown.