Optical Activity and Epimers Quiz

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What is the purpose of using OsO4 in the hydroxylation reaction of alkenes?

To give a higher yield

Why are gem diols unstable in aqueous solutions?

Due to the presence of water promoting dehydration to form aldehydes or ketones

In the Pinacol-Pinacolone rearrangement, what is the main purpose of the protonation step?

To initiate the formation of carbocation

Why is OsO4 used in catalytic amounts in the hydroxylation reaction of alkenes?

<p>Due to its high toxicity and volatility</p> Signup and view all the answers

What is the outcome of treating epoxides with aqueous acid?

<p>Formation of a trans 1,2-diol</p> Signup and view all the answers

Which compound is formed when gem diols dehydrate in the absence of water?

<p>Ketone</p> Signup and view all the answers

What role does sodium bisulfate play in the OsO4-catalyzed formation of diols from alkenes?

<p>Catalyzes the formation of trans 1,2-diols</p> Signup and view all the answers

What is the primary reason for using catalytic amounts of osmium tetraoxide (OsO4) in reactions?

<p>High toxicity and volatility</p> Signup and view all the answers

'The alkene is treated with osmium tetraoxide, followed by sodium bisulfate' - What is the purpose of treating with sodium bisulfate in this sequence?

<p>To neutralize excess acid</p> Signup and view all the answers

What is the consequence of using KMnO4 for oxidation of alkenes?

<p>Low yields due to further oxidation of functional groups</p> Signup and view all the answers

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