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