Arrange the following in increasing order of their basic strength:

C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2 and (C2H5)2NH


Alkyl group contribute inductive effect which increases the basic strength of compounds.


NH3<C2H5NH2<(C2H5)2NH.


Then C6H5NH2 is having –I effect that reduces strength. And C6H5CH2NH2 increases the basic strength but not as much as C2H5 group.


Hence final order will be C6H5NH2<NH3<C6H5CH2NH2<C2H5NH2<(C2H5)2NH.


4
1