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Question

p-Hydroxybenzaldehyde does not undergo Cannizzaro reaction. Explain.

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Solution

In Basic medium, OH takes proton of the Hydroxy group leaving behind O, which is the strong activating group (+R+I). When O come in Resonance with an aldehyde group, the carbonyl carbon is no longer electrophilic. So, OH cannot attack there and hence Reaction will not proceed.

993499_250938_ans_e45431b176d14a609b6994385e610b3d.png

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