Why tirtary carbocations are more stable than, secondary and primary carbocations? Explain.

Explanation

The stability of carbocations can be explained on the basis of +I effect. Larger the,+I effect, larger will be the stability. The alkyl group attached to the positively charged carbon atom has +I effect (electron releasing tendency). They release electrons toward the positively charged carbon atom. As a result, the positive charge on the C-atom decreases and itself becomes electron deficient. As a result the positive charge on the C-atom gets dispersed. So, the larger the number of alkyl groups, the larger will be the disperal of positive charge. Hence, tertiary carbocations are more stable than the secondary and primary carbocations.
`R-underset((3^@))underset("Tertiary carbocation")underset(R)underset(|)overset(R)overset(|)(C^(o+))gt R-underset((2^@))underset("secondary carbocation")underset(H)underset(|)overset(R)overset(|)(C^(o+))gt R-underset((1^@))underset("Primary carbocation")underset(H)underset(|)overset(H)overset(|)(C^(o+))gt R-underset((1^@))underset("Methyl carbocation")underset(R)underset(|)overset(R)overset(|)(C^(o+))`