Naslov
Chiral Chromenes: Thermal and Photochemical Racemization of Enantiomers

Autori
Mintas, Mladen ; Lončar, Linda ; Trötcsh, Thomas ; Mannschreck, Albrecht

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
Central European Photochemistry Conference

Mjesto i datum
Krems an der Donau, Austrija, 03.08.1993. - 06.08.1993

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
kiralni kromeni; racemizacija enantiomera
(chromenes; photoracemization)

Sažetak
Separation or enrichment of enantiomers of the novel chromenes (1)-(5) were accomplisched by liquid chromatography on triacetyl– or tribenzoylcellulose. The barriers to reversible electrocyclic ring opening were determined by thermal racemization of the separated enantiomers. Gibbs energies of activation, ∆ G ≠ , for interconversion of enantiomers of (1), (3) and (4) amount to l06-123 kJ/mol. Photochemically induced interconversion of prparatively isolated enantiomers, that is, photoracemization, was also performed for (1).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA