Question

Which isomer of
CH3CH2CH2CH2CH2NH2
is most basic in gaseous state?​

Answer 1

The tertiary amine isomer is the most basic, followed by secondary amine isomer and then primary amine isomer

Explanation:

• The alkyl group releases electron and causes dispersion of the positive charge of the alkyl ammonium ion and therefore helps to stabilises it.

• The tertiary amine is connected to three alkyl groups and thus helps in better stabilisation of charges compared to secondary amine which is connected to two alkyl groups resulting in weak stabilisation  and primary which is connected to one alkyl group , having weaker stabilisation followed by ammonia which has no alkyl group thus having the weakest stabilisation.

• Therfore, the correct order for basicity of amine isomers in the gaseous phase is: tertiary amine isomer > secondary amine isomer > primary amine isomer > NH3.