Naslov
Indolinospironaphthopyrans: Barriers to Thermal Cleavage of the C(sp3)-O Bond

Autori
Lončar, Linda ; Mintas, Mladen ; Lorenz, Kondrad ; Mannschreck, Albrecht

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

Skup
The tenth Dubrovnik International Course and Conference on the Interfaces among Mathematics, Cemistry and Computer Sciences

Mjesto i datum
Dubrovnik, Hrvatska, 26.06.1995. - 01.07.1995

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Indolinospironaftopirana
(spiro[indolino-naphthopyrans])

Sažetak
2H-Chromenes or 2H-l-benzopyrans have been the subject of extensive studies largely because of their photochromism and its application in display and storage of information as well as solar energy converion. Our interests in chiral 2H-chromenes and indolinospirobenzopyrans and -oxazines were related to separation of their enantiomers and determination of barriers to racemization. This study is concerned with the synthesis of the novel spiro[indolino-naphthopyrans] l and 2 and determination of barriers for reversible thermal cleavage of the C(sp3 )-O bond by dynamic 1H NMR spectroscopy. The free enthalpy of activation for l amounts to ∆ G≠ = 77 kJ/mol.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA