Engineering
Chemistry
Test of Alkenes and alkynes
Question

What is the producy 'P'.

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Solution
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Ref. image I

Deuterium exchange destroys the resonance of the benzene by replacing all the H atoms by D.
Thus, the product P is :- C6D6
Ref. image II
If Deuterium oxide is present in limited amount it will only replace 1 Hydrogen by deuterium.
Ref. image III
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