3-Methyl- and 3,4-dimethylselenophenes were prepared in 78 and 80% yield, respectively, by passage of 2-methyl-l,3-butadiene and 2,3-dimethyl-1,3-butadiene driven by nitrogen through a glass tube kept at 450°C containing fragments of Pyrex glass or sand and selenium vapor.
morphology, electrochemical, electronic and optical properties, and the electrochromic performances of the as-obtained poly(3-methylselenophene) (P3MeS) films were minutely studied. Surprisingly, we find a very significant electrolyte effect on the electropolymerization behavior of 3MeS and also on the structure, morphology, redox activity and stability, and optoelectronic and electrochromic properties
Mahatsekake, C.; Catel, J. M.; Andrieu, C. G., Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 47, # 1+2, p. 35 - 41
作者:Mahatsekake, C.、Catel, J. M.、Andrieu, C. G.、Ebel, M.、Mollier, Y.、Tourillon, G.
DOI:——
日期:——
Free-radical homolytic substitution at selenium: an efficient method for the preparation of selenophenes
作者:Jennifer E. Lyons、Carl H. Schiesser、Katarina Sutej
DOI:10.1021/jo00073a021
日期:1993.10
Substituted and unsubstituted 1-(benzylseleno)-4-iodobut-3-en-2-ols 12 and 2-(benzylseleno)-1-(2-iodophenyl)ethanols 18 react smoothly with tris(trimethylsilyl)silane in benzene at 80-degrees-C (AIBN initiator) to afford selenophenes 16 and benzoselenophenes 21 in excellent yield. These reactions presumably involve intramolecular homolytic substitution by aryl and vinyl radicals 14 and 20 at the selenium atom with the expulsion of benzyl radical followed by facile dehydration to afford the aromatic selenophene ring system in each case. Competitive rate studies on the ring closure of the 2-[2-(benzylseleno)ethyl]phenyl radical 25 in the presence of tri-n-butyltin hydride to give 2,3-dihydrobenzo[b]selenophene (27) and 1-(benzylseleno)-2-phenylethane (28) provide a rate constant for ring closure (k(c)) of approximately 3 X 10(7) s-1 at 80-degrees-C. The determination of more accurate data is hampered by what we attribute to be the involvement of a slow, but competive nonradical process.
Jur'ew et al., Zhurnal Obshchei Khimii, 1958, vol. 28, p. 3036,3040; engl. Ausg. S. 3066, 3069