2 and 3 - position are prefer in pyrrole for electrophilic substitution reaction why ?
Answers
Answer:
(1) Area of the ΔDEI=1/2 × Base × Height
⇒1/2×60×40
=1200m
2
(2) Area of the Trapezium EFGI=1/2× (Sum of the two parallel sides) × Height
⇒1/2×(60+50)×70
⇒1/2×110×70
=3850m
2
(3) Area of the ΔAFG=1/2 × Base × Height
⇒1/2×50×50
=1250m
2
(4) Area of the TrapeziumABCH=1/2 ×(Sum of the two parallel sides) × Height
⇒1/2×(40+30)×80
⇒1/2×70×80
=2800sqm
(5) Area of theΔCDH= 1/2× Base × Height
The height of this figure is not clear in the image. I think it is 80m and I have assumed it 80m.
⇒1/2×40×80
=1600m
2
Total area = Area of ΔDEI+ Area of the Trapezium EFGI+ Area of ΔAFG+ Area of Trapezium ABCH+ Area of ΔCDH
⇒1200+3850+1250+2800+1600
=10700 m
2
So, the area of the figure ABCDEF is 10700m
2
Answer:
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 reason behind it is the more number of resonating intermediate structure are possible to accommodate the positive charge when electrophile attacks on 2nd position (three resonating intermediate structures) that makes the intermediate carbocation more stable while if electrophile attacks on the 3rd position then only two resonating intermediate structures are possible as shown in the figure which is comparitively less stable. That’s why the attack of electrophiles takes place at 2nd position in pyrrole, thiophene, and furan.
Explanation: