help@askiitians.com

+91-87964 74404

Grade 12th passAIPMT

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

Question image for I AM UNABLE TO UNDERSTAND THIS QUESTION . HELP ME

NIRMALYA MUKHERJEE

7 Years agoGrade 12th pass

1 Answer

Arun

Approved Tutor Answer7 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.

NEET COACHING FOR GRADE 9 STUDENT IN ABU DHABI,UAE. What are the options available

aipmt

1 Answer Available

Last Activity: 4 Years ago

Mam today in neet ug 2021 due to my nervousness I bubbled one wrong figure of my roll number but I have filled the roll number correctly in the blocks the invigilator adviced me to leave it as it is and to bubble the same correct figure so I did that .am very much worried what will happen

aipmt

1 Answer Available

Last Activity: 4 Years ago

Magnetic Length of bar magnet of length 70 cm is 63 cm. Want a solution for this.

aipmt

1 Answer Available

Last Activity: 5 Years ago

in the stomatal apparatus why are subsidiary celss absent in cucurbits?

aipmt

1 Answer Available

Last Activity: 5 Years ago

Any student studying in Maharashtra since first standard till 10th, takes up NEET coaching in Kota, Rajasthan. Will ge be eligible for admission into MBBS medical colleges in Maharashtra under 85% state quota seats

aipmt

1 Answer Available

Last Activity: 5 Years ago

View all Questions