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Chapter 10: PROBLEM 10.48 (page 422)

Question: Which alcohols can be prepared as a single product by hydroboration–oxidation of an alkene? Which alcohols can be prepared as a single product by the acid-catalyzed addition of H2O to an alkene?

a.

b.

c.

d.

Short Answer

Expert verified

Answer

²¹.±á²â»å°ù´Ç²ú´Ç°ù²¹³Ù¾±´Ç²Ô–o³æ¾±»å²¹³Ù¾±´Ç²Ô.

b.Acid-catalyzed addition.

c.Acid-catalyzed addition.

d. ±á²â»å°ù´Ç²ú´Ç°ù²¹³Ù¾±´Ç²Ô–o³æ¾±»å²¹³Ù¾±´Ç²Ô and acid-catalyzed addition.

Step by step solution

01

Hydroboration-oxidation reaction

±á²â»å°ù´Ç²ú´Ç°ù²¹³Ù¾±´Ç²Ô–o³æ¾±»å²¹³Ù¾±´Ç²Ô reaction comes to show the addition of an OH group on the less substituted carbon.

02

Acid catalyzed addition  

The acid-catalyzed addition of H2O results in the addition of an OH group on the more substituted carbon.

03

Explanation

a. The given compound has a substitution of the propyl group. Therefore, the hydroboration- oxidation reaction occurs on the less substituted side.

±á²â»å°ù´Ç²ú´Ç°ù²¹³Ù¾±´Ç²Ô–o³æ¾±»å²¹³Ù¾±´Ç²Ô

b. The given compound has a substitution of the methyl group. Therefore, the acid catalyzed reaction occurs on the more substituted side.

Acid-catalyzed addition

c. The given compound has a substitution of the cyclohexyl group. Therefore, the hydroboration reaction occurs on the less substituted side.

Acid-catalyzed addition

d. The given compound has a substitution of the hexyl group. Therefore, the acid catalyzed reaction as well as hydroboration oxidation occurs.

±á²â»å°ù´Ç²ú´Ç°ù²¹³Ù¾±´Ç²Ô–o³æ¾±»å²¹³Ù¾±´Ç²Ô and acid-catalyzed addition

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