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Why is nitrogen nearly planar in aromatic amines such as aniline?
AIt is bonded to four groups
BIt carries no lone pair at all
CIt forms a triple bond to carbon
DLone pair conjugates with ring
Answer & Solution
Correct answer: D. Lone pair conjugates with ring
Conjugation of the nitrogen lone pair with the aryl ring flattens the nitrogen and shortens the C-N bond.
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