The correct order with respect to –I effect of the substituents is:
(R = alkyl)
1. –NH2 > –OR < –F
2. –NR2 < –OR < –F
3. –NH2 > –OR > –F
4. –NR2 > –OR > –F
The most stable carbocation among the following is:
1. | 2. | ||
3. | 4. |
In pyrrole
the electron density is maximum on:
1. 2 and 3
2. 3 and 4
3. 2 and 4
4. 2 and 5