Crystal structures of two charge-transfer com-plexes of benzo[1,2-c:3,4-c':5,6-c'']tri-thio-phene (D 3h -BTT)

Charge Transfer Complexes of New Sulfur- and Selenium-Rich Aromatic Donors

Two new sulfur- and selenium-rich pentacyclic aromatic compounds were prepared by short chemical syntheses. The two donors readily formed charge transfer (CT) complexes upon reaction with antimony pentachloride or tris(4-bromophenyl)ammoniumyl hexachloroantimonate. The X-ray structures of the heterocyclic donors and their CT complexes were determined. The donors flattened considerably upon CT complex formation.