Design of reversible multi-electron redox systems using benzochalcogenophenes containing aryl and/or ferrocenyl fragments was written by Ogawa, Satoshi;Muraoka, Hiroki;Kikuta, Kenji;Saito, Fumihito;Sato, Ryu. And the article was included in Journal of Organometallic Chemistry in 2007.Synthetic Route of C8H4Br2S This article mentions the following:
2,3-Disubstituted benzo[b]thiophenes, 1,3-disubstituted benzo[c]thiophenes, and 1,3-disubstituted benzo[c]selenophene were systematically and selectively synthesized from benzo[b]thiophene or phthaloyl dichloride as a starting material, resp. Characterization of the mols. was performed by phys. and spectroscopic means and x-ray crystallog. analyses. The cyclic voltammograms of the chalcogenophene derivatives containing aryl fragments showed well-defined reversible both anodic and cathodic steps derived from the unusually stable 5π chalcogenophene radical cations and 7π chalcogenophene radical anions. The cyclic voltammograms of the novel chalcogenophene derivatives containing ferrocenyl fragments showed a well-defined reversible cathodic step derived from the unusually stable 7π chalcogenophene radical anions and 2 distinct reversible anodic steps derived from ferrocenium cations separated from each other by a thiophene-heterocycle. The radical character of several novel 7π chalcogenophene radical anions was measured by ESR spectroscopy. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Synthetic Route of C8H4Br2S).
2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The core structure is a part of various pharmaceutical substances and natural products. It is also used in the manufacturing of dyes such as thioindigo.Synthetic Route of C8H4Br2S
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem