KVPY SA Exam 2018 Question Paper

Question : 38 of 80

Marks: +1, -0

The most acidic proton and the strongest nucleophilic nitrogen in the following compound

Respectively, are

$N^a –H; N^b$
$N^b –H; N^c$
$N^a -H; N^c$
$N^c -H; N^a$

Solution:

Most acidic proton = “b” as the conjugate base is resonance stabilized and the most nucleophilic nitrogen is “c” as the lone pair electron on nitrogen is localized in

sp^3

hybrid orbital.

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