The reason the below product are not formed in addition reactions should be explained. Concept introduction: Alkenes are regarded electron-rich and often undergo addition reaction in presence of electrophilic halo acids or nucleophilic sodium cyanide. The intermediate formed in former is tertiary carbocation and finally nucleophilic part of halo acid attacks in a rapid step to give addition product. The product formed is governed by Markovnikov’s Rule. Rule suggests that negative part of halo acid HX must go to the carbon that has more alkyl substituents or less H atoms. This is also justified as intermediate tertiary carbocation involved in this pathway is highly stable intermediate.

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Chapter 8, Problem 2E

Interpretation Introduction

Interpretation: The reason the below product are not formed in addition reactions should be explained.

Concept introduction: Alkenes are regarded electron-rich and often undergo addition reaction in presence of electrophilic halo acids or nucleophilic sodium cyanide. The intermediate formed in former is tertiary carbocation and finally nucleophilic part of halo acid attacks in a rapid step to give addition product.

The product formed is governed by Markovnikov’s Rule. Rule suggests that negative part of halo acid HX must go to the carbon that has more alkyl substituents or less H atoms. This is also justified as intermediate tertiary carbocation involved in this pathway is highly stable intermediate.

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