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Alcohols, Phenols And Ethers

Question
CBSEENCH12008250
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What is meant by hydroboration-oxidation reaction? Illustrate it with an example.

Solution

The addition of borane followed by oxidation is known as the hydroboration-oxidation reaction.

In the first step, alkene reacts with diborane (B2H6) as boron hydride (BH3) to form an alkyl borane. In the next step, the alkyl borane is oxidised by alkaline H2O2 to form an alcohol. The indirect hydration proceeds according to Anti Markovnikoff’s rule. For example,
bold 3 bold CH subscript bold 3 bold CH bold space bold equals bold space bold CH subscript bold 2 bold plus bold BH subscript bold 3 bold space bold rightwards arrow bold space bold space bold space stack bold left parenthesis bold CH subscript bold 3 bold CH subscript bold 2 bold CH subscript bold 2 bold right parenthesis subscript bold 3 bold B with bold Tri bold minus bold n bold minus bold propyl bold space bold borate below bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold space bold rightwards arrow from bold H subscript bold 2 bold O to bold H subscript bold 2 bold O subscript bold 2 bold divided by bold OH to the power of bold minus of bold space stack bold 3 bold CH subscript bold 3 bold CH subscript bold 2 bold CH subscript bold 2 bold OH with bold Propan bold minus bold 1 bold minus bold ol below bold plus stack bold H subscript bold 3 bold BO subscript bold 3 with bold Boric bold space bold acid below

Some More Questions From Alcohols, Phenols and Ethers Chapter

Classify the following as primary, secondary and tertiary alcohols:

Classify the following as primary, secondary and tertiary alcohols:

Classify the following as primary, secondary and tertiary alcohols:

Classify the following as primary, secondary and tertiary alcohols:

Identify allylic alcohols in the above examples.

Name the following compounds according to IUPAC system.

Name the following compounds according to IUPAC system.

Name the following compounds according to IUPAC system.

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