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Questions and Answers
What is the main purpose of using OsO4 in the hydroxylation reaction of alkenes?
What is the main purpose of using OsO4 in the hydroxylation reaction of alkenes?
- To give a trans 1,2-diol
- To catalyze the Pinacol-Pinacolone rearrangement
- To convert alkenes to cis-diol (correct)
- To dehydrate gem diols
Why is OsO4 used in catalytic amounts in the hydroxylation reaction of alkenes?
Why is OsO4 used in catalytic amounts in the hydroxylation reaction of alkenes?
- Because it is toxic, volatile, and expensive (correct)
- To prevent over-oxidation of the glycol
- To increase the reaction yield
- To accelerate the reaction rate
What happens to most gem diols in aqueous solutions?
What happens to most gem diols in aqueous solutions?
- They remain stable
- They form 1,2-diols
- They undergo hydroxylation reactions
- They dehydrate to form aldehydes or ketones (correct)
What is the Pinacol-Pinacolone rearrangement?
What is the Pinacol-Pinacolone rearrangement?
What does the Pinacol-Pinacolone rearrangement involve in terms of steps?
What does the Pinacol-Pinacolone rearrangement involve in terms of steps?
Which compound is formed from the acid-catalyzed dehydration of glycols?
Which compound is formed from the acid-catalyzed dehydration of glycols?
What is the outcome of treating an epoxide with aqueous acid?
What is the outcome of treating an epoxide with aqueous acid?
Why should OsO4 be used in limited quantities in reactions?
Why should OsO4 be used in limited quantities in reactions?
What is a major disadvantage of using KMnO4 for the oxidation of alkenes?
What is a major disadvantage of using KMnO4 for the oxidation of alkenes?
In the Pinacol-Pinacolone rearrangement mechanism, what role does carbocation formation play?
In the Pinacol-Pinacolone rearrangement mechanism, what role does carbocation formation play?
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