Abstract Treatment of aromatic aldehydes with sulfur and hydrazine hydrate in the ratio 1: 2: 3, respectively, under the Willgerodt conditions affords the title compounds in excellent yields and in a good state of purity. Under the same conditions 2-chloro and 2, 6- dichlorobenzaldehyde yield 3H-1, 2-benzodithiole-3-thione and bis-(2, 6-dichlorobenzyl) tetrasulfide, respectively.
![6-[5-(6-oxocyclohexa-2,4-dien-1-ylidene)-1,3,4-thiadiazolidin-2-ylidene]cyclohexa-2,4-dien-1-one Structure](https://image.chemsrc.com/caspic/244/88203-22-9.png)
