0

Guest

Courses New
  • Forum
  • AIPMT
  • I AM UNABLE TO UNDERSTAND THIS QUESTION ....

I AM UNABLE TO UNDERSTAND THIS QUESTION . HELP ME TO ITS ANSWER

I AM UNABLE TO UNDERSTAND THIS QUESTION .  HELP ME TO ITS ANSWER

Question Image
Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago
Pyrrole has maximum electron density on 2 and 5. It generally reacts with electrophiles at the C-2 or C-5 due to the highest degree of stability of the protonated intermediate. Attack at position 3 or 4 yields a carbocation that is a hybrid of structures (I) and (II). Attack at position 2 or 5 yields a carbocation that is a hybrid not only of structures (III) and (IV) (analogous to I and II) but also of structure (V). The extra stabilization conferred by (V) makes this ion the more stable one.  Also, attack at position 2 or 5 is faster because the developing positive charge is accommodated by three atoms of the ring instead of by only two.

Think You Can Provide A Better Answer ?

Other Related Questions on AIPMT

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More