Chapter 22.4, Problem 20SSC

Interpretation Introduction

(a)

Interpretation:

The given reaction needs to be completed.

${\text{CH}}_{\text{3}}\text{CH}={\text{CHCH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{H}}_{\text{2}}\to$

Concept introduction:

The functional group is the group present on the main carbon chain of an organic compound. It determines the chemical properties and the type of reactions an organic compound can show.

Answer to Problem 20SSC

${\text{CH}}_{\text{3}}\text{CH}={\text{CHCH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{H}}_{\text{2}}\to {\text{CH}}_{\text{3}}{\text{CH}}_2{\text{CH}}_2{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}$

Explanation of Solution

The given reaction is as follows:

${\text{CH}}_{\text{3}}\text{CH}={\text{CHCH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{H}}_{\text{2}}\to$

In the above case, addition reaction takes place where 2 H atoms gets add to the two carbon atoms (1 C atom each) to form an addition product of alkane as follows:

${\text{CH}}_{\text{3}}\text{CH}={\text{CHCH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{H}}_{\text{2}}\to {\text{CH}}_{\text{3}}{\text{CH}}_2{\text{CH}}_2{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}$

Interpretation Introduction

(b)

Interpretation:

The given reaction needs to be completed.

${\text{CH}}_{\text{3}}{\text{CH}}_2\text{CH}\left(\text{Cl}\right){\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{OH}}^{-}\to$

Concept introduction:

The functional group is the group present on the main carbon chain of an organic compound. It determines the chemical properties and the type of reactions an organic compound can show.

Answer to Problem 20SSC

${\text{CH}}_{\text{3}}{\text{CH}}_2\text{CH}\left(\text{Cl}\right){\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{OH}}^{-}\to {\text{CH}}_{\text{3}}{\text{CH}}_2\text{CH}\left(\text{OH}\right){\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{Cl}}^{-}$

Explanation of Solution

The given reaction is as follows:

${\text{CH}}_{\text{3}}{\text{CH}}_2\text{CH}\left(\text{Cl}\right){\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{OH}}^{-}\to$

In the above case, substitution reaction takes place where, hydroxyl group replaces the chloride group in alkyl halide.

The complete reaction will be as follows:

${\text{CH}}_{\text{3}}{\text{CH}}_2\text{CH}\left(\text{Cl}\right){\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{OH}}^{-}\to {\text{CH}}_{\text{3}}{\text{CH}}_2\text{CH}\left(\text{OH}\right){\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{Cl}}^{-}$

In this case, elimination reaction is also possible which is represented as follows:

${\text{CH}}_{\text{3}}{\text{CH}}_2\text{CH}\left(\text{Cl}\right){\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{OH}}^{-}\to {\text{CH}}_{\text{3}}{\text{CH=CHCH}}_{\text{2}}{\text{CH}}_{\text{3}}+{\text{Cl}}^{-}+{\text{H}}_{\text{2}}\text{O}$

The elimination reaction will be favored when ethanol is given as a solvent. As, solvent is not mentioned thus, it is considered that solvent is water. Therefore, substitution reaction takes place.