Synthesis, Characterization, and Structure of Cyclopenta[c]thiophenes and Their Manganese Complexes
Cyclopenta[c]thiophenes (2, Scheme 1) and η5-cyclopenta[c]- thienyl complexes are useful in a broad range of applications. For example, several cyclopenta[c]thiophenes exhibit significant antitumor properties.1,2 Heterocycle-fused cyclopentadienyl, including cyclopenta[c]thienyl, zirconium complexes effectively catalyze the regiospecific polymerization of 1-alkenes.3-6 We have a long-term interest 7-10 in the electronic properties of organometallic analogues of the low-band-gap polymer poly(benzo[3,4-c]thiophene) (polyisothianaphthene)11-14 that incorporate η5-cyclopenta[c]thienyl monomers.
Journal of the American Chemical Society, 2005, Vol. 127, No. 43, 15010-15011.