Chapter 27, Problem 58IAE

Interpretation Introduction

(a)

Interpretation:

The formula of the product formed by the reaction of $\text{but-2-ene}$ with ${\text{H}}_2$ in the presence of $\text{Pt}$ catalyst should be written.

Concept introduction:

Reaction of unsaturated compounds (alkene and alkynes) with hydrogen gas in the presence of a metal catalyst is called catalytic hydrogenation reaction. In this reaction, hydrogen molecule adds across the carbon-carbon double bond to give a saturated compound (alkane).

Interpretation Introduction

(b)

Interpretation:

The formula of the product formed by the reaction of $\text{but-2-ene}$ with ${\text{Cl}}_2$ should be written.

Concept introduction:

Reaction of alkenes with chlorine gas $\left({\text{Cl}}_2\right)$ is called hydrogenation or addition reaction. In this reaction, chlorine molecule adds across the carbon-carbon double bond to give a saturated compound.

Interpretation Introduction

(c)

Interpretation:

The formula of the product formed by the reaction of $\text{but-2-ene}$ with $\text{HCl}$ should be written.

Concept introduction:

Reaction of alkenes with hydrogen halide $\left(\text{HCl}\right)$ is an example of an addition reaction. In this reaction, chlorine and hydrogen atom adds across the carbon-carbon double bond to give a saturated compound.

Interpretation Introduction

(d)

Interpretation:

The formula of the product formed by the reaction of $\text{but-2-ene}$ with water $\left({\text{H}}_2\text{O}\right)$ in the presence of acid should be written.

Concept introduction:

Reaction of alkenes with water in the presence of acid is an example of hydration reaction to give corresponding alcohol.