Question

Draw the condensed structural formula for the ester in jojoba wax that is formed from arachidic acid, a 20-carbon saturated fatty acid, and 1-docosanol, ${\mathrm{CH}}_3-{\left({\mathrm{CH}}_2\right)}_{21}-\mathrm{OH}$.

Short answer

The ester in jojoba wax that is formed from arachidic acid, a 20-carbon saturated fatty acid, and 1-docosanol,${\mathrm{CH}}_3-{\left({\mathrm{CH}}_2\right)}_{21}-\mathrm{OH}$

Step-by-step solution

Given data

The ester in jojoba wax that is formed from arachidic acid, a 20-carbon saturated fatty acid, and 1-docosanol,${\mathrm{CH}}_3-{\left({\mathrm{CH}}_2\right)}_{21}-\mathrm{OH}$

An Introduction

Jojoba esters are hydrogenated or transesterified products of jojoba oil. Jojoba ester is widely used in cosmetics as a emollient because it is very similar to the natural oil produced by human skin and has high oxidative stability.

 Determine the ester in jojoba wax that is formed from arachidic acid, a 20-carbon saturated fatty acid, and 1-docosanol, CH3-CH221-OH.

The given reaction is an esterification in which a carboxylic acid reacts with an alcohol in the presence of an acidic catalyst to form an ester.

The given carboxylic acid is arachidic acid which has $20$carbon atoms in a saturated unbranched chain and a carboxyl group on the l st carbon.

The given alcohol is 1-docosanol which has$22$carbon atoms in an unbranched chain and a hydroxy group on the l st carbon.