Preferred Label : cross-conjugation;
IUPAC definition : In a system XC sub 6 /sub H sub 4 /sub GY this is conjugation involving the substituent
X, the benzene ring and the side-chain connective-plus-reaction site GY, i.e. either
X is a i R /i group and GY is a - i R /i group, or X is a - i R /i group and
GY is a i R /i group. In Hammett correlations this situation can lead to the need
to apply exalted substituent constants σ or σ-, respectively, as in electrophilic
or nucleophilic aromatic substitution, respectively. The term 'through resonance'
is synonymous. Cross conjugation has also been used to describe the interactions occurring
in 2-phenylallyl and similar systems.;
Origin ID : C01404;
See also
In a system XC sub 6 /sub H sub 4 /sub GY this is conjugation involving the substituent
X, the benzene ring and the side-chain connective-plus-reaction site GY, i.e. either
X is a i R /i group and GY is a - i R /i group, or X is a - i R /i group and
GY is a i R /i group. In Hammett correlations this situation can lead to the need
to apply exalted substituent constants σ or σ-, respectively, as in electrophilic
or nucleophilic aromatic substitution, respectively. The term 'through resonance'
is synonymous. Cross conjugation has also been used to describe the interactions occurring
in 2-phenylallyl and similar systems.
