For the following reaction, what does the question mark represent?
Correct answer: A. C2H5COCH3
- A. C2H5COCH3
- B. C2H5CH(CH3)OH
- C. CH3COCH3
- D. C2H5CH2CHO
Explanation
When HCN reacts with a ketone, two new bonds form. The H from HCN adds to 0 in C=O to form C-OH bond and -CN adds to C to form C- CN bond. The ketone is given in option A and C, but the one having the same number of carbon atoms as the product is in option A. The product formed is called 'cyanohydrin' and it has the CN and OH group on the same carbon.
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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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