Question

Draw the condensed structural formula for alkane or line angle formula cycloalkane for each of the following:

1. Methane
2. Ethane
3. Butane
4. Cyclopropane

Short answer

Structural formulas of compounds are:

1. ${\mathrm{CH}}_4$: Methane
2. ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_3$: Ethane
3. ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$: Butane
4. 

Step-by-step solution

Part(a) Step 1: Given Information

We need to draw the condensed structural formula for alkane or line angle formula cycloalkane for methane.

Part (a) Step 2: Explanation

Methane is an alkane of single carbon atom so as asked in question we need to draw condensed structure for alkane.

Hence, Structure of methane is ${\mathrm{CH}}_4$

Part(b) Step 1: Given Information

We need to draw the condensed structural formula for alkane or line angle formula cycloalkane for below given compound: Ethane

Part (b) Step 2: Explanation

Ethane is compound of two carbon atom with all single bonds so it is an alkane as asked in question we need to draw condensed structure for alkane.

Hence, Structure of ethane is ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_3$

Part(c) Step 1: Given Information

We need to draw the condensed structural formula for alkane or line angle formula cycloalkane for below given compound: Butane

Part (c) Step 2: Explanation

Butane is compound of four carbon atom with all single bonds so it is an alkane as asked in question we need to draw condensed structure for alkane.

Hence, Structure of butane is ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

Part(d) Step 1: Given Information

We need to draw the condensed structural formula for alkane or line angle formula cycloalkane for below given compound: Cyclopropane

Part (d) Step 2: Explanation

Cyclopropane is compound of three carbon atoms with all single bonds so it is cycloalkane as asked in question we need to draw line angle structure for cycloalkanes.

Hence, Structure of cyclopropane is