23. Lipids

Which of the following fatty acids would you expect to be more soluble in cyclohexane?

Provide a condensed structural formula for a fatty acid with 18 carbons (18:0) and give its common name.

Provide a skeletal structure for Linolenic acid.

Use Figure 23.1 to identify the family of lipids to which each of these molecules belongs.

b.

Draw the complete structural formula of arachidonic acid (Table 23.1) in a way that shows the cis stereochemistry of its four double bonds.

Draw an 18-carbon saturated fatty acid. Is this a “straight-chain” molecule or a “bent” molecule?

Draw an 18-carbon unsaturated fatty acid that contains two carbon–carbon double bonds, one on carbon 6 and one on carbon 9 (count starting with the carboxyl carbon). Is this a “straight-chain” molecule or a “bent” molecule?