Terthiophene
Terthiophene is the organic compound with the formula [C4H3S]2C4H2S. It is an oligomer of the heterocycle thiophene, a shorter oligomer is dithienyl, and the parent polymer is polythiophene. In the most common isomer of terthiophene, two thienyl groups are connected via their 2 positions to a central thiophene, also at the carbon atoms flanking the sulfur.
Preparation of terthiophene
Terthiophene is prepared by the nickel- or palladium-catalysed coupling reaction of 2,5-dibromothiophene with the Grignard reagent derived from 2-bromothiophene.[1]
Properties and applications
This substance is likely responsible for the insecticidal activity of Tagetes minuta as it can react with light and oxygen to make singlet oxygen.[2] [3]
Together with derivatives of 2,2'-bithiophene, various chlorinated terthiophenes occur naturally in thistles.[4]
Terthiophene has been employed as building block for the organic semi-conductor polythiophene.
See also
References
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