A Contribution to the Direct Observation of a Didehydroheteroaromatic with a Five‐Membered Ring: 2,3‐Didehydrothiophene | Zendy

Teles Joaquim Henrique | Zendy; Hess B. Andes | Zendy; Schaad Lawrence J. | Zendy

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A Contribution to the Direct Observation of a Didehydroheteroaromatic with a Five‐Membered Ring: 2,3‐Didehydrothiophene

Author(s) -

Teles Joaquim Henrique,

Hess B. Andes,

Schaad Lawrence J.

Publication year - 1992

Publication title -

chemische berichte

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 0009-2940

DOI - 10.1002/cber.19921250221

Subject(s) - chemistry , matrix isolation , flash vacuum pyrolysis , ring (chemistry) , pyrolysis , spectroscopy , photodissociation , infrared spectroscopy , matrix (chemical analysis) , organic chemistry , chromatography , physics , quantum mechanics

The flash vacuum pyrolysis and the photolysis of 2,3‐thiophenedicarboxylic acid anhydride ( 6 ) were investigated by using the technique of matrix isolation combined with FT‐IR spectroscopy. No conclusive proof for the existence of 2,3‐didehydrothiophene ( 1 ) could be found, but two hitherto unknown isomers were isolated and characterized: vinylidenethioketene ( 10 ) and thioformylvinylidenecarbene ( 15 ).

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