Q.

Which one of the following is most basic ?

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a

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b

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c

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d

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answer is C.

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Detailed Solution

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  • Basicity is enhanced by the presence of electron donating group & availability of a lone pair of electrons on the nitrogen atom, which is not possible in case of aromatic amines and pyridine due to delocalization of electrons on aromatic carbon ring.
  • Thus, pyrrolidine and cyclohexyl amine are more basic than aromatic amines.
  • Pyrrolidine(2oamine) is comparatively more basic due to more +I effect than cyclohexylamine (1oamine) because, electrons are less available for protonation with acid than that of Pyrrolidine.
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