(a)
Interpretation:
To draw all resonance structures of enolate ion formed from the given set of compounds and predict whether a substantial amount of starting
Concept introduction:
Keto-enol isomerization is possible when a keto group present in the compound has a movable hydrogen atom in the next carbon attached to the carbonyl group. This occurs generally in almost all keto compounds where a chemical equilibria is present between the keto and enol form of the compound. Conversion of keto to its enol form is known as keto-enol tautomerisation. This conversion occurs in presence of acid or base. The ion fomed after the deprotonation using base at the
Symmetrical ketone=Symmetrical
Unsymmetrical Ketone=Unymmetrical
To Draw : The resonance structure of enolate ion and predict whether substantial amount of starting ketone will be present after equilibrium if sodium ethoxide is used as base.
(b)
Interpretation:
To draw all resonance structures of enolate ion formed from the given set of compounds and predict whether a substantial amount of starting ketone will be present with enolate after equilibrium when treated with sodium ethoxide.
Concept introduction:
Keto-enol isomerization is possible when a keto group present in the compound has a movable hydrogen atom in the next carbon attached to the carbonyl group. This occurs generally in almost all keto compounds where a chemical equilibria is present between the keto and enol form of the compound. Conversion of keto to its enol form is known as keto-enol tautomerisation. This conversion occurs in presence of acid or base. The ion fomed after the deprotonation using base at the
Symmetrical ketone=Symmetrical
Unsymmetrical Ketone=Unymmetrical
To Draw : The resonance structure of enolate ion and predict whether substantial amount of starting ketone will be present after equilibrium if sodium ethoxide is used as base.
(c)
Interpretation:
To draw all resonance structures of enolate ion formed from the given set of compounds and predict whether a substantial amount of starting ketone will be present with enolate after equilibrium when treated with sodium ethoxide.
Concept introduction:
Keto-enol isomerization is possible when a keto group present in the compound has a movable hydrogen atom in the next carbon attached to the carbonyl group. This occurs generally in almost all keto compounds where a chemical equilibria is present between the keto and enol form of the compound. Conversion of keto to its enol form is known as keto-enol tautomerisation. This conversion occurs in presence of acid or base. The ion fomed after the deprotonation using base at the
Symmetrical ketone=Symmetrical
Unsymmetrical Ketone=Unymmetrical
To Draw : The resonance structure of enolate ion and predict whether substantial amount of starting ketone will be present after equilibrium if sodium ethoxide is used as base.
(d)
Interpretation:
To draw all resonance structures of enolate ion formed from the given set of compounds and predict whether a substantial amount of starting ketone will be present with enolate after equilibrium when treated with sodium ethoxide.
Concept introduction:
Keto-enol isomerization is possible when a keto group present in the compound has a movable hydrogen atom in the next carbon attached to the carbonyl group. This occurs generally in almost all keto compounds where a chemical equilibria is present between the keto and enol form of the compound. Conversion of keto to its enol form is known as keto-enol tautomerisation. This conversion occurs in presence of acid or base. The ion fomed after the deprotonation using base at the
Symmetrical ketone=Symmetrical
Unsymmetrical Ketone=Unymmetrical
To Draw : The resonance structure of enolate ion and predict whether substantial amount of starting ketone will be present after equilibrium if sodium ethoxide is used as base.
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