Naslov
13C NMR Spectra of Symmetrically 2, 2’ -Disubstituted Stilbenes: Conjugational and conformational Effects

Autori
Vikić-Topić, Dražen ; Mintas, Mladen ; Meić, Zlatko

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

Skup
3. Jugoslavenski simpozij o organskoj kemiji

Mjesto i datum
Ljubljana, Slovenija, 29.05.1984. - 01.06.1984

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
simetrično 2; 2'-disupstiruirani stilbeni; 13C NMR spektri
(symmetrically 2; 2’ -disubstituted stilbenes)

Sažetak
The effects of ortho substituents in 13C NMR spectra of symmetrically 2, 2’ -disubstituted cis- and trans-stilbenes were studied. In cis-stilbenes the decrease of α -effects and increase of γ -effects, both at ortho carbons, with respect to corresponding trans isomers were observed. The magnitude of olefinic one-bond C-H apparent coupling constant depends on ortho substituent and on type of isomer – in cis-stilbenes this splitting is greater than in trans-stilbenes. The found differences in substituent effects and in coupling constants are assumed to result from the different conjugational interactions in cis- and trans-stilbenes, existing due to the distinct configurations and conformations.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA