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In an SN1 reaction, why does a tertiary carbocation has more reactivity than a primary carbocation. The nucleophile anyhow has to attack the carbocation and a tertiary carbocation will offer steric hindrance. A primary carbocation won’t offer a steric hindrance to the nucleophile. I know a tertiary carbocation is more stable than a primary carbocation but why is steric crowding not taken into consideration?

In an SN1 reaction, why does a tertiary carbocation has more reactivity than a primary carbocation. The nucleophile anyhow has to attack the carbocation and a tertiary carbocation will offer steric hindrance. A primary carbocation won’t offer a steric hindrance to the nucleophile. 
I know a tertiary carbocation is more stable than a primary carbocation but why is steric crowding not taken into consideration?

Grade:12

1 Answers

Umakant biswal
5359 Points
6 years ago
@ ishaan 
in this case the stability dominates the hindrance . 
beacuse the hindrance angle of attack is more , stability will be the factor which taken into consideration , and not steric crowding . 
HOPE U ARE CLEARS NOW 
ALL THE BEST . 
LET ME KNOW IF ANY FURTHER DOUBT ..

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