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Chapter 10: Q.27. (page 414)

Question: Draw the products formed when each alkene is treated with BH3followed by H2O2,HO-. Include the stereochemistry at all stereogenic centers.

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01

 Step 1:Hydroboration-oxidation reaction

This reaction consists of two steps: hydroboration and oxidation. It gives a racemic mixture of alcohols.

02

Formation of products for a, b and c

a.

The reaction of but-1-ene with BH3followed by oxidation is shown below:

Product formation in a

b.

The reaction of (S)-1,4-dimethylcyclohex-1-ene with BH3 followed by oxidation is shown below:

Product formation in b

c.

The reaction of 1-ethylcyclopent-1-ene with BH3 followed by oxidation is shown below:

Product formation in c

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