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.

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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?