When HBr reacts with 1-butene, the product formed has to be predicted. Concept introduction: Addition reaction: Alkene reacts with polar reagent across the double bond, addition of hydrogen (electrophile) to the least substituted carbon and nucleophile bonded to the most substituted carbon. Markovnikov’s rule: In the overall reaction, the hydrogen atom (electrophile) is bonded to least substituted carbon and nucleophile is bonded to the most substituted carbon. This is known as Markovnikov’s rule.

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Chapter 11, Problem 11.25QP

a)

Interpretation Introduction

Interpretation:

When HBr reacts with 1-butene, the product formed has to be predicted.

Concept introduction:

Addition reaction: Alkene reacts with polar reagent across the double bond, addition of hydrogen (electrophile) to the least substituted carbon and nucleophile bonded to the most substituted carbon.

Markovnikov’s rule:

In the overall reaction, the hydrogen atom (electrophile) is bonded to least substituted carbon and nucleophile is bonded to the most substituted carbon. This is known as Markovnikov’s rule.

b)

Interpretation Introduction

Interpretation:

When HBr reacts with 2-butene, the product formed has to be predicted.

Concept introduction:

Addition reaction: Alkene reacts with polar reagent across the double bond, addition of hydrogen (electrophile) to the least substituted carbon and nucleophile bonded to the most substituted carbon.

Markovnikov’s rule:

In the overall reaction, the hydrogen atom (electrophile) is bonded to least substituted carbon and nucleophile is bonded to the most substituted carbon. This is known as Markovnikov’s rule.

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