Crystal structure of 9,10-bis­(1,3-di­thiol-2-yl­idene)-9,10-di­hydro­anthracene

The title complex is composed of saddle-shaped mol­ecules which closely inter­act in a pairwise fashion through π–π and C—H⋯π contacts to form ‘dimers’. These ‘dimers’ further inter­act through C—H⋯S and C—H⋯π contacts to construct a complex three-dimensional extended structure.
The crystal structure of the well-studied 9,10-bis­(1,3-di­thiol-2-yl­idene)-9,10-di­hydro­anthracene mol­ecule, C20H12S4, (I), also known as exTTF, is reported. The mol­ecular structure of (I) consists of a di­hydro­anthracene moiety with two 1,3-di­thiol-2-yl­idene substituents. This is a saddle-shaped mol­ecule, which inter­acts with a close neighbor through various π–π and C—H⋯π contacts to form a ‘dimer’. These ‘dimers’ inter­act through a series of C—H⋯S and C—H⋯π contacts to construct a complex three-dimensional extended structure.