Three new electron donors, acenaphtho[5,6-cd]-1,2-dithiole (1), acenaphtho[5,6-cd]-1,2-diselenole (2), and acenaphtho[5,6-cd]-1,2-ditellurole (3), can be prepared in 28%, 22%, and 14% yields respectively by reaction of the elemental chalcogens (S, Se, Te) with 5,6-dilithioacenaphthylene (4). Compound 4 is generated by treatment of 5,6-dibromoacenaphthylen (5), for which a convenient preparation is