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Chapter 31: Lipids

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Organic Chemistry
Pages: 1231 - 1256

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25 Questions for Chapter 31: Lipids

  1. One component of lanolin, the wax that coats sheep’s wool, is derived from cholesterol and stearic acid. Draw its structure, including the correct stereochemistry of all stereogenic centers.

    Found on Page 1256
  2. A flask contains 1/3 mole of H2 and 2/3 mole of He. Compare the force on the wall per impact of H2 relative to that for He.

    Found on Page 1256
  3. Consider separate 1.0-L samples of O2(g) and He(g), both at 25oC and the same pressure. Compare the change in momentum per impact and the number of impacts per second in the two samples.

    Found on Page 1256
  4. Question: Locate the isoprene units in biformene, a component of amber, and classify biformene as a monoterpene, sesquiterpene etc.

    Found on Page 1231
  5. Question:Triacylglycerol L yields compound M when treated with excess , Pd-C. Ozonolysis of L ([1] ; [2] affords compounds N-P. What is the structure of L?

    Found on Page 1231
  6. Question: Locate the isoprene units in each compound.

    Found on Page 1231
  7. Question: Classify each terpene and terpenoid in Problem 31.26 (e.g., as a monoterpene, sesquiterpene, etc.).

    Found on Page 1231
  8. Crocin, which occurs naturally in crocus and gardenia flowers, is primarily responsible for the color of saffron.

    Found on Page 1231
  9. Question: An isoprene unit can be thought of as having a head and a tail. The “head” of the isoprene unit is located at the end of the chain nearest the branch point, and the “tail” is located at the end of the carbon chain farthest from the branch point. Most isoprene units are connected together in a “head-to-tail” fashion, as illustrated. For both lycopene (Problem 31.26), and squalene (Figure 31.9), decide which isoprene units are connected in a head-to-tail fashion and which are not.

    Found on Page 1231
  10. Question: Draw a stepwise mechanism for the conversion of neryl diphosphate to , is a component of pine oil and rosemary oil.

    Found on Page 1231

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