Naslov
Effect of ortho Substituents in the Electron Impact Induced Fragmentation of 2, 2'-disupstitututed Stilbenes

Autori
Mintas, Mladen ; Jakopčić, Krešimir ; Klasnic, Leo ; Güsten, Hans

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

Skup
7th Internationall Mass Spectrometry Conference

Mjesto i datum
Firenca, Italija, 30.08.1976. - 03.09.1976

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
2; 2'-disupstituirani Stilbeni;
(Electron Impact Induced Fragmentation; 2; 2'-disupstitututed Stilbenes)

Sažetak
The effect of ortho substituents NH2, OCH3, CH3, Cl and NO2 on the fragmentation of five symmetrically and five unsymmetrically 2, 2'-disubstituted stilbenes under electron impact was investigated. The fragmentation patterns deduced were supported by metastable transitions in the first and second field free regions and by exact mass measurements of prominent ions. In general, the fragmentation was found to be in accord with that of stilbene and the corresponding monosubstituted stilbenes. There are, howerer, some deviations from the general fragmentation scheme saused by direct through-space interactions of the ortho, ortho substituents with concomitant loss of neutral fragments. It is supposed that formation of 7-membered cyclic or heterocyclic ions is the result of such througl-space reactions.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA