Chapter 31: Q33P. (page 1259)
Draw three-dimensional structures for each alcohol. Label the OH groups as occupying axial or equatorial positions.
a.
b.
c.
d.
Short Answer
Answer
a.
b.
c.
d.
Chapter 31: Q33P. (page 1259)
Draw three-dimensional structures for each alcohol. Label the OH groups as occupying axial or equatorial positions.
a.
b.
c.
d.
Answer
a.
b.
c.
d.
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Get started for freea. Draw a three-dimensional structure for the following steroid.
b. What is the structure of the single stereoisomer formed by reduction of this ketone with H2 , Pd-C? Explain why only one stereoisomer is formed.
(a) Draw a skeletal structure of the anabolic steroid 4-androstene-3, 17-dione, also called “andro,” from the following description. Andro contains the tetracyclic steroid with carbonyl groups at C3 and C17, a double bond between C4 and C5, and methyl groups bonded to C10 and C13.
(b) Add wedges and dashed wedges for all stereogenic centers with the following information: the configuration at C10 is R, the configuration at C13 is S, and all substituents at ring fusions are trans to each other.
Draw all possible constitutional isomers of a triacylglycerol formed from one mole each of palmitic, oleic, and linoleic acids. Locate the tetrahedral stereogenic centers in each constitutional isomer.
Axial alcohols are oxidized faster than equatorial alcohols by PCC and other oxidants. Which OH group in each compound is oxidized faster?
a.
b.
Draw the structure of a lecithin containing oleic acid and palmitic acid as the fatty acid side chains.
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