The correct decreasing order of thermodynamic stability for the given alkyl carbocations is: — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Carbocation stability is directly proportional to the number of hyperconjugable $\alpha$ -hydrogens and the $+I$ effect of attached alkyl groups. The $3^\circ$ carbocation ($(CH_3)_3C^+$) has 9 $\alpha$ -hydrogens, making it overwhelmingly the most stable.