Chapter 22, Problem 42E

Interpretation Introduction

Interpretation:

The nine possible condensed structure of the beeswax molecules is to be stated.

Concept introduction:

Lipids are the water-insoluble compounds found in the living organisms. Lipids are parted into three classes (1) Fats, oils and phospholipids, (2) waxes, and (3) steroids.

In the waxes, beeswax is the first ever discovered wax.

Answer to Problem 42E

The nine possible molecules of beeswax molecules are shown below.

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{6}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{8}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{10}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{12}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{14}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{16}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{18}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{20}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{22}}{\text{CH}}_{\text{3}}$

Explanation of Solution

Waxes are the ester of long chain fatty acids with long chain alcohols. Beeswax is solid wax containing the esters of saturated fatty acids with long chain alcohols. The number of carbons in the alkyl group of alcohol ranges from $\text{30-32}$.

The nine possible molecules of beeswax with the long chain alcohols are shown below.

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{6}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{8}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{10}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{12}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{14}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{16}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{18}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{20}}{\text{CH}}_{\text{3}}$

• ${\text{CH}}_{\text{3}}{{\text{(CH}}_{\text{2}}\text{)}}_{\text{29}}\text{OC}\left(\text{O}\right){\left({\text{CH}}_{\text{2}}\right)}_{\text{22}}{\text{CH}}_{\text{3}}$

Conclusion

The nine possible structures of beeswax molecules are rightfully stated above.