In organosulfur chemistry, 1,3-dithioles are a class of heterocycles based on the parent compound 1,3-dithiacyclopentene (also known as 1,3-dithiole). The ligand dmit<sup>2-</sup> is a 1,3-dithiole. Heating solutions of Na<sub>2</sub>dmit gives the isomeric disulfide, a 1,2-dithiole.