Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?? [2025]

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Q.
Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct [2025]

1 p-nitrobenzaldehyde < benzaldehyde < p-tolualdehyde < acetophenone

2 acetophenone < p-tolualdehyde < benzaldehyde < p-nitrobenzaldehyde

3 benzaldehyde < acetophenone < p-nitrobenzaldehyde < p-tolualdehyde

4 acetophenone < benzaldehyde < p-tolualdehyde < p-nitrobenzaldehyde

Ans.
(2)

Lesser is crowding around C=O and more is partial positive charge on carbon of C=O, more is reactivity of carbonyl compounds towards nucleophilic addition. Electron withdrawing groups increase partial positive charge and electron releasing groups decrease partial positive charge on C=O.

Solution

Q.
Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct [2025]

1 p-nitrobenzaldehyde < benzaldehyde < p-tolualdehyde < acetophenone

2 acetophenone < p-tolualdehyde < benzaldehyde < p-nitrobenzaldehyde

3 benzaldehyde < acetophenone < p-nitrobenzaldehyde < p-tolualdehyde

4 acetophenone < benzaldehyde < p-tolualdehyde < p-nitrobenzaldehyde

Ans.
(2)

Lesser is crowding around C=O and more is partial positive charge on carbon of C=O, more is reactivity of carbonyl compounds towards nucleophilic addition. Electron withdrawing groups increase partial positive charge and electron releasing groups decrease partial positive charge on C=O.

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Solution

Q. Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct [2025]

1 p-nitrobenzaldehyde < benzaldehyde < p-tolualdehyde < acetophenone

2 acetophenone < p-tolualdehyde < benzaldehyde < p-nitrobenzaldehyde

3 benzaldehyde < acetophenone < p-nitrobenzaldehyde < p-tolualdehyde

4 acetophenone < benzaldehyde < p-tolualdehyde < p-nitrobenzaldehyde

Ans. (2) Lesser is crowding around C=O and more is partial positive charge on carbon of C=O, more is reactivity of carbonyl compounds towards nucleophilic addition. Electron withdrawing groups increase partial positive charge and electron releasing groups decrease partial positive charge on C=O.

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Q.
Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct [2025]

Ans.
(2)

Lesser is crowding around C=O and more is partial positive charge on carbon of C=O, more is reactivity of carbonyl compounds towards nucleophilic addition. Electron withdrawing groups increase partial positive charge and electron releasing groups decrease partial positive charge on C=O.