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Physical Properties

Which of the ...

Question

Which of the following orders is true regarding the basic nature of NH₂ group?

A

O - toluidine > Aniline > O - nitro aniline

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B

O - toluidine < Aniline > O - nitro aniline

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C

O - toluidine < Aniline < O - nitro aniline

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D

O - toluidine > Aniline< O - nitro aniline

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Solution

The correct option is B
O - toluidine < Aniline > O - nitro aniline

Ortho substituted anilines are usually less basic than aniline irrespective of the nature of substituent. This is called Ortho effect.

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