Pregled bibliografske jedinice broj: 210148
13C NMR Spectra of some Simetrically 2, 2’ -Disubstituted Stlbenes: Conjugational and Conformational Effects
13C NMR Spectra of some Simetrically 2, 2’ -Disubstituted Stlbenes: Conjugational and Conformational Effects // Journal of molecular structure, 267 (1992), 405-410 doi:10.1016/0022-2860(92)87064-3 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 210148 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
13C NMR Spectra of some Simetrically 2, 2’ -Disubstituted Stlbenes: Conjugational and Conformational Effects
(13C NMR Spectra of some Simetrically 2, 2’ -Disubstituted Stlbenes: Conjugational and Conformational Effects13C NMR Spectra of some Simetrically 2, 2’ -Disubstituted Stlbenes: Conjugational and Conformational Effects)
Autori
Vikić-Topić, Dražen ; Mintas, Mladen ; Raos, Nenad
Izvornik
Journal of molecular structure (0022-2860) 267
(1992);
405-410
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
2 ; 2’ -disubstituted cis-stilbenes ; 13C NMR Spectra ; Conjugational and Conformational Analysis
Sažetak
In the 13C NMR spectra of symmetrically 2, 2’ -disubstituted cis-stilbenes the decrease of alpha-effects and increase of gamma-effects at ortho-carbons with respect to trans-isomers were observed. However, the most significant differences in substituent effects between trans- and cis-isomers were founf for gamma-effects, at unsubstituted ortho-C-6 and C-4 atoms. The one bond C-H splitting of olefinic carbons is greater in cis-than trans-stilbenes. The differences in substituent effects and apparent coupling constants are asumed to originate mainly from the different conjugational interactions in cis- and trans-stilbenes. The conformational and configurational differences of these molecules were substantiated by molecular mechanics calculations.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
