Question

Which position of furan is readily attacked by electrophiles and why ?​

Answer 1

Answer:

This is due to attack at C-2 gives more stable intermediate( it is stabilised by three resonance structures ) than the intermediate resulted from C-3 attack(as it is stabilised by two resonance structures) Mechanism of electrophilic substitution on pyrrole:

Explanation:

यह C-2 पर हमले के कारण अधिक स्थिर मध्यवर्ती देता है (यह तीन अनुनाद संरचनाओं द्वारा स्थिर होता है) मध्यवर्ती की तुलना में C-3 हमले के परिणामस्वरूप होता है (क्योंकि यह दो अनुनाद संरचनाओं द्वारा स्थिर होता है) पाइरोल पर इलेक्ट्रोफिलिक प्रतिस्थापन का तंत्र:

Answer 2

Furan is readily attacked by electrophiles

Explanation:

• Pyrrole, thiophene, and furan gives electrophilic aromatic substitution reaction.
• These compounds are more reactive compared to benzene.
• Electrophiles majorly attack on 2nd position rather than 3rd position in these heterocyclic compounds.
• The furan undergoes electricity substitution on the 2nd position.
• The electrophilic substitution at C2 position gives more resonating structure than substitution at C3 position.
• More the resonating structure, the molecules is more stable, so the C2 attack prefers.
• The compound which is most reactive towards the electrophilic substitution is the Methyl group.
• Activating groups attached to the benzene ring increase the reactivity of benzene towards electrophilic substitution.