When a nucelophile encounters a ketone the site of attack is:

The carbon atom of the carbonyl

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The oxygen atom of the carbonyl

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Both the carbon and oxygen atoms with equal probability

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No attack occurs-ketones do not react with nucleophiles

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Solution

The correct option is A The carbon atom of the carbonyl
Nucleophile attacks on the carbon atom of the carbonyl group as shown in the figure.

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Similar questions

Q. When a nucleophile encounters a ketone, the site of attack is:

The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile

Aldehyde reacts with $2^{\circ}$ amines to form

Q. When semicarbazide reacts with a ketone(or aldehyde) to form semicarbazone. Only one nitrogen atom of semicarbazide acts as a nucleophile and attack the carbonyl carbon of the ketone. The product of the reaction consequently is

R_{2} C = N - N H - C O {N H}_{2}

rather than

R_{2} C = N C O N H - {N H}_{2}

. What factor account for the fact that two nitrogen atoms of semicarbazide are relatively non nucleophilic?

Q. Assertion :Alkenes undergo electrophilic addition whereas aldehydes and ketones undergo nucleophilic addition. Reason: In alkenes the double bond joins two carbon atoms and there is no resultant polarity. In carbonyl compounds, the carbonyl group is highly polar and the high partial positive charge on the C atom makes it subsceptible to nucleophilic attack.

Q. Assertion :Benzaldehyde is less reactive in comparison to ethanol towards nucleophilic attack. Reason: All the carbon atoms of benzaldehyde are

s p^{2} -

hybridised.

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When a nucelophile encounters a ketone the site of attack is:

The correct option is A The carbon atom of the carbonylNucleophile attacks on the carbon atom of the carbonyl group as shown in the figure.

The correct option is A The carbon atom of the carbonyl
Nucleophile attacks on the carbon atom of the carbonyl group as shown in the figure.