Chapter 5.9, Problem 13P

Interpretation Introduction

Interpretation:

The more stable carbocation in the given pair is to be identified.

Concept introduction:

The carbocation becomes stable when atoms or groups attached to it stabilize the positive charge on it.

The induced polarization of sigma bond is called inductive effect.

The electron donating atom or group has a positive inductive effect that stabilizes the positive charge on carbon.

The electron withdrawing atom or group has negative inductive effect that destabilizes the positive charge on carbon.

The alkyl groups have electron donating inductive effect and stabilize carbocation (carbon with positive charge).

The alkyl groups also show delocalization of electrons in sigma bonds through hyperconjugation and stabilized carbocation.

Hyperconjugation is the delocalization of electrons in $\text{C-H}$ sigma bond of methyl/alkyl group.