On 3,5,6-trihalo-2-(pyrrol-2-yl)-1,4-benzoquinones

✍ Scribed by Ribó, Josep M. ;Acero, Carles

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 674 KB
• Volume: 1995
• Category: Article
• ISSN: 0947-3440
• DOI: 10.1002/jlac.199519950370

✦ Synopsis

Abstract

In the reaction of pyrroles with tetrahalo‐1,4‐benzoquinones two different processes occur: the oxidation of pyrrole and the coupling reaction to 3,5,6‐trihalo‐2‐(pyrrol‐2‐yl)‐1,4‐benzoquinones. Excess of pyrrole results in doped polypyrrole as the principal reaction product. Excess of tetrahalobenzoquinone and dilution, provides the title compounds. The UV/Vis spectra and the electrochemical behaviour show that the title compounds have the HOMO localized at the pyrrole and the LUMO at the quinone ring.