Stearidonic acid (C18H28O2) is an unsaturated fatty acid obtained from oils isolated

Chapter 12, Problem 12.38

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Stearidonic acid (C18H28O2) is an unsaturated fatty acid obtained from oils isolated from hemp and blackcurrant (see also 10.12). OH stearidonic acid O a. What fatty acid is formed when stearidonic acid is hydrogenated with excess H2 and a Pd catalyst? b. What fatty acids are formed when stearidonic acid is hydrogenated with one equivalent of H2 and a Pd catalyst? c. Draw the structure of a possible product formed when stearidonic acid is hydrogenated with one equivalent of H2 and a Pd catalyst, and one double bond is isomerized to a trans isomer. d. How do the melting points of the following fatty acids compare: stearidonic acid; one of the products formed in part (b); the product drawn in part (c)?

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