Chapter 6, Problem 6.1YT

Drawing Structural and Condensed Structural Formulas

Give the molecular formula, and draw the structural formula and condensed structural formula for the alkane with 10 carbon atoms.

Interpretation Introduction

Interpretation:

The molecular formula, structural formula and condensed structural formula are to be represented for the alkane with $10$ carbon atoms.

Concept Introduction:

The organic compounds which consist of only carbon and hydrogen atoms are called hydrocarbons. The atoms in hydrocarbons are linked by single, double, or triple bonds.

The graphic representation of a chemical compound is called its structural formula. It represents the arrangement of atoms.

In a condensed structural formula, the bond between atoms in a compound is represented by the absence of a line.

The chemical formula that represents the total number of atoms arranged in a molecule is known as the molecular formula.

Answer to Problem 6.1YT

Solution: Molecular formula for an alkane is given as:

${\text{C}}_{\text{10}}{\text{H}}_{\text{22}}$

The structural formula for an alkane contains $10$ carbon atoms and can be represented as:

The condensed structural formula for an alkane has $10$ carbon atoms and can be represented as:

${\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}$

Or

${\text{CH}}_{\text{3}}{\left({\text{CH}}_{\text{2}}\right)}_{\text{8}}{\text{CH}}_{\text{3}}$

Explanation of Solution

The molecular formula for an alkane with $10$ carbons bonded with single bond can be represented as follows:

${\text{C}}_{\text{10}}{\text{H}}_{\text{22}}$

The structural formula for an alkane compound which contains $10$ carbon and $22$ hydrogen atoms linked together by single bond can be represented as follows:

The condensed structural formula for a pentane consists of $10$ carbon and $22$ hydrogen atoms bonded to each other by single bonding. The name of the compound is decane. The condensed structural formula can be represented as follows:

${\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}$

Or

${\text{CH}}_{\text{3}}{\left({\text{CH}}_{\text{2}}\right)}_{\text{8}}{\text{CH}}_{\text{3}}$

Conclusion

Molecular formula, the structural formula and the condensed structural formula for an alkane has $10$ carbon atoms are respectively as below:

${\text{C}}_{\text{10}}{\text{H}}_{\text{22}}$,

and

${\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}$

Or

${\text{CH}}_{\text{3}}{\left({\text{CH}}_{\text{2}}\right)}_{\text{8}}{\text{CH}}_{\text{3}}$