Which one is more basic, $C H_{3} N H_{2} o r C F_{3} N H_{2}$ ?

C H_{3} N H_{2}

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C F_{3} N H_{2}

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Both have similar basicity

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None of the above

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Solution

The correct option is A $C H_{3} N H_{2}$
Between $H_{3} C ¨ N H_{2}, F_{3} C ¨ N H_{2}, H_{3} ¨ N H_{2}$ is more basic than $F_{3} C ¨ N H_{2}$ because $- C H_{3}$ group is an electron donating group so shows posetive inductive effect and donates electron density to nitrogen which makes lone pair on nitrogen more destabilished and are available for reaction .but $C F_{3}$ group is an electron density from nitrogen as it shows negative inductive effect and so lone pairs on nitrogen are not available for reactions.

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