Chapter 19.4, Problem 19.4PP

Interpretation Introduction

(a)

Interpretation:

The structure of triacylglycerol that containsthree molecules of stearic acid ( ${\text{CH}}_{\text{3}}{\left({\text{CH}}_{\text{2}}\right)}_{16}\text{COOH}$ ) should be drawn.

Concept Introduction:

Triacylglycerols are most abundant lipids which are mainly found in animal fat and vegetable oils. They are triesters of glycerol, therefore, in the formation of one molecule of triacylglycerol, three molecules of fatty acids react with one molecule of glycerol as given below: ${\text{CH}}_{\text{2}}{\text{(OH)CH(OH)CH}}_{\text{2}}\text{(OH) + 3 R- COOH}\stackrel{}{\to }{\text{CH}}_{\text{2}}{\text{(OCOR)CH(OCOR)CH}}_{\text{2}}{\text{(OCOR) + 3 H}}_{\text{2}}\text{O}$

Interpretation Introduction

(b)

Interpretation:

The structure of triacylglycerol that contains three molecules of oleic acid ( ${\text{CH}}_{\text{3}}{\left({\text{CH}}_{\text{2}}\right)}_{\text{7}}\text{CH=CH}{\left({\text{CH}}_{\text{2}}\right)}_{\text{7}}\text{COOH}$ ) should be drawn.

Concept Introduction:

Triacylglycerols are most abundant lipids which are mainly found in animal fat and vegetable oils. They are triesters of glycerol, therefore in the formation of one molecule of triacylglycerol, three molecules of fatty acids react with one molecule of glycerol as given below:

  ${\text{CH}}_{\text{2}}{\text{(OH)CH(OH)CH}}_{\text{2}}\text{(OH) + 3 R- COOH}\stackrel{}{\to }{\text{CH}}_{\text{2}}{\text{(OCOR)CH(OCOR)CH}}_{\text{2}}{\text{(OCOR) + 3 H}}_{\text{2}}\text{O}$