2,2 '-Spirobi(l,3-benzodithiole)

The X-ray structure analysis of 2,2'-spirobi(1,3-benzodithiole), C13H8S4, h as been performed. The molecule has crystallographic twofold rotation symme try, the axis passing through the spiro-C atom. The four S atoms are arrang ed around the spiro-C atom in two almost orthogonal CS2 planes. However, be cause of large bending of the two five-membered rings, close contact is pre sent between two connected C atoms on the benzo group of each 1,3-benzodith iole ring and one S atom on the other 1,3-benzodithiole ring.