Chapter 22, Problem 61A

(a)

Interpretation Introduction

Interpretation − To draw the structural formula of propyne.

Introduction −

Structural formula is representation of molecule that shows arrangement of atoms and bonds.

Steps to draw the structural formula:

1. Analyse the type of hydrocarbon using suffix in name.
2. Prefixes indicate the type of substituents and the times of each substituent. The number indicate the position of substituent
3. Start with drawing all the carbon -carbon bonds.
4. Carbon hydrogen bonds are understood.

Explanation of Solution

Propyne has three carbon atom chain and used the suffix “yne”, hence it is an alkyne and contains a triple bond. Following can be the structure of propyne:

  

(b)

Interpretation Introduction

Interpretation − To draw the structure of cyclohexane,

Introduction −

Structural formula is representation of molecule that shows arrangement of atoms and bonds.

Steps to draw the structural formula:

1. Analyse the type of hydrocarbon using suffix in name.
2. Prefixes indicate the type of substituents and the times of each substituent. The number indicate the position of substituent
3. Start with drawing all the carbon -carbon bonds.
4. Carbon hydrogen bonds are understood.

Explanation of Solution

Cyclohexane is a cyclic structure with six carbon atoms containing the single bonds.

The structure can be:

  

(c)

Interpretation Introduction

Interpretation − To draw the structure of $2-phenylpropane$ .

Introduction −

Structural formula is representation of molecule that shows arrangement of atoms and bonds.

Steps to draw the structural formula:

1. Analyse the type of hydrocarbon using suffix in name.
2. Prefixes indicate the type of substituents and the times of each substituent. The number indicate the position of substituent
3. Start with drawing all the carbon -carbon bonds.
4. Carbon hydrogen bonds are understood.

Explanation of Solution

The given compound is $2-phenylpropane$.It contains parent chain with three carbon atoms and a triple bond since uses as suffix “yne”. It also has one phenyl group as a substituent on second carbon atom. Following can be the structure:

  

(d)

Interpretation Introduction

Interpretation − To draw the structure of $2,2,4-trimethylpentane$

Introduction −

Structural formula is representation of molecule that shows arrangement of atoms and bonds.

Steps to draw the structural formula:

1. Analyse the type of hydrocarbon using suffix in name.
2. Prefixes indicate the type of substituents and the times of each substituent. The number indicate the position of substituent
3. Start with drawing all the carbon -carbon bonds.
4. Carbon hydrogen bonds are understood.

Explanation of Solution

The give compound $2,2,4-trimethylpentane$. It contains parent chain with five carbon atoms with single bonds triple bond since uses as suffix “ane”. It also has three methyl groups as substituents. Two methyl groups present on second carbon atom and on methyl group on fourth carbon atom. Following can be the structure: