Write a short note on Resonance effect.

1.	Write a short note on Resonance effect.
Answer» Resonance Effect: The polarity produced in the molecule by the interaction of two pi bonds or between a pi bond and lone pair of electron present on an adjacent atom. (i) Positive resonance effect: In this effect, the transfer of electrons is away from an atom or substituent group attached to the conjugated system. The atoms of groups which show + R effect are halogens, -OH, -OR, -NH₂ etc. (ii) Negative resonance effect: In this effect, the transfer of electrons is towards the atom or substituent group attached to the conjugated system. The atoms or groups which dhow -R effect is -COOH -CHO, -CH etc.

Answer»

Resonance Effect: The polarity produced in the molecule by the interaction of two pi bonds or between a pi bond and lone pair of electron present on an adjacent atom.

(i) Positive resonance effect: In this effect, the transfer of electrons is away from an atom or substituent group attached to the conjugated system. The atoms of groups which show + R effect are halogens, -OH, -OR, -NH₂ etc.

(ii) Negative resonance effect: In this effect, the transfer of electrons is towards the atom or substituent group attached to the conjugated system. The atoms or groups which dhow -R effect is -COOH -CHO, -CH etc.

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