M. Kozaki, Shōji Tanaka, Y. Yamashita
1994
Citations
0
Influential Citations
25
Citations
Journal
Journal of Organic Chemistry
Abstract
4-(1,3-Dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophenes 1 and 7-(1,3-dithiol-2-ylidene)-7H-cyclopenta[1,2-b;4,3-b']]dithiophenes 2 were prepared by Wittig-Horner or Wittig reactions. The X-ray structural analyses of the parent compounds 1a and 2a reveal that both molecules have planar structures with short intermolecular S...S contacts, and 2a additionally has short intramolecular S...S contacts. They have low oxidation potentials and absorptions in a long wavelength region due to the 1,3-dithiole skeleton. Electrochemical oxidation of 1 and 2 afforded the corresponding polymers 3 and 4, which have low oxidation potentials. Electrochemically dedoped films of 3 and 4 have interband absorptions at 610-690 nm and 420-590 nm, respectively, in their electronic spectra