question_answer

    The basicity of aniline is less than that of cyclohexylamine. This is due to

A)  \[+R-\]effect of\[-N{{H}_{2}}\] group

B)  \[-I\]effect of\[-N{{H}_{2}}\]group

C) \[-R\]effect of\[-N{{H}_{2}}\]group

D)  hyper conjugation effect

Correct Answer: A

Solution :

                \[N{{H}_{2}}\]has\[+R\]effect, it donates electrons to the benzene ring. As a result, the lone pair of electron on the\[N-\]atom gets delocalized over the benzene ring and thus it is less readily available for protonation. Hence, aniline is a weaker base than cyclohexylamine. Resonance structure of aniline.