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What is hydroboration oxidation in alkenes?

Answer 1

Hydroboration-oxidation is a method of making alcohols from alkenes.

It involves the addition of #"BH"_3# to an alkene, followed by oxidation with alkaline hydrogen peroxide to form an alcohol.

The reaction is a Markovnikov addition of #"BH"_3# to the alkene

On oxidation of the boron intermediate, the #"OH"# group ends up on the less substituted carbon.

This is opposite to the position of the #"OH"# group in the acid-catalyzed Markovnikov addition of water to an alkene, so the reaction is often called the anti-Markovnikov addition of water to an alkene.

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Answer 2

Ellie Adams

Hydroboration-oxidation in alkenes involves the addition of boron and subsequent oxidation to produce alcohols. It typically uses boron compounds like boron trifluoride etherate (BF₃·OEt₂) in the presence of borane (BH₃) as a reducing agent, followed by oxidation with hydrogen peroxide (H₂O₂) or alkaline hydrogen peroxide to yield anti-Markovnikov alcohols.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.