What is the structure of alcohol which on oxidation with acidified Na2Cr2O7 gives:
Correct answer: A. A
- A. A
- B. B
- C. C
- D. D
Explanation
Structure A represents 1-phenylethanol, which is a secondary alcohol. The alcohol group (-OH) is on a carbon atom that is bonded to a benzene ring and a methyl group (CH_3). Oxidation of this specific secondary alcohol removes the hydrogen atom from the carbon and the hydrogen from the hydroxyl group, forming a double bond between the carbon and oxygen, which results in the ketone, acetophenone.
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Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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