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Allyl systems conjugation

These compounds, (2) and (3), are of theoretical interest, since they have cyclic 7r-orbital systems, and ab initio MO calculations have been performed to estimate what degree of stabilization may result. This was done by calculating the AE for their formation by an isodesmic reaction with a hypothetical cyclobutanone enol ion (19a,b), which also has a four-membered ring with an allylic system conjugated to an oxygen atom. [Pg.371]

More highly substituted alkenes react faster (trisubstituted > disubstituted > monosubstituted), as illustrated by the reaction of 4,8-dimethylnona-l,7-diene (350) to give 351. Allylic systems conjugated to a carbonyl react slower than unconjugated alkenes. Conjugated alkenes do react if there is no competi-tion.217,219... [Pg.1113]

See other pages where Allyl systems conjugation is mentioned: [Pg.240]    [Pg.390]    [Pg.390]    [Pg.391]    [Pg.392]    [Pg.392]    [Pg.393]    [Pg.394]    [Pg.395]    [Pg.396]    [Pg.396]    [Pg.398]    [Pg.398]    [Pg.399]    [Pg.400]    [Pg.400]    [Pg.401]    [Pg.402]    [Pg.402]    [Pg.403]    [Pg.404]    [Pg.404]    [Pg.405]    [Pg.406]    [Pg.406]    [Pg.407]    [Pg.408]    [Pg.408]    [Pg.409]    [Pg.410]    [Pg.411]    [Pg.412]    [Pg.412]    [Pg.413]    [Pg.414]    [Pg.415]    [Pg.416]    [Pg.416]    [Pg.417]    [Pg.418]    [Pg.418]    [Pg.419]    [Pg.420]    [Pg.420]    [Pg.421]    [Pg.422]    [Pg.422]   
See also in sourсe #XX -- [ Pg.96 , Pg.228 ]



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Allyl system

CONJUGATION IN ALKADIENES AND ALLYLIC SYSTEMS

Conjugate allylation

Conjugate system

Conjugated alkenes allylic systems

Conjugated system conjugation)

Conjugated systems

Conjugated systems allylic carbocation

Conjugated systems allylic carbocations

Conjugated systems allylic cations

Conjugated unsaturated systems allyl cation

Conjugated unsaturated systems allyl radical

Conjugated unsaturated systems allylic substitution

Conjugation in allylic systems

Dienes and the Allyl System 2p Orbitals in Conjugation

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