1.

Basicity of CH_(3)CH_(2)NH_(2)(I),CH_(3)CONH_(2)(II)and C_(6)H_(5)CONH_(2)(III) follows the order:

Answer»

IgtIIgtIII
IgtIIIgtII
IIgtIIIgtI
IIIgtIIgtI

Solution :Due to DELOCALIZATION of electrons over the C=O group, amides are much less basic than amines. Thus, I is more basic than II and III. Now due to STRONG +R-effect of the `C_(6)H_(5)` group, it pushes

electrons into the C=O group more readily than the `CH_(3)` group which can exert only it weak +I-effect. in other words, electrons on `NH_(2)` group in `CH_(3)CONH_(2)(II)` are more easily delocalised than on the `NH_(2)` group of `C_(6)H_(5)CONH_(2)(III)`. this means `C_(6)H_(5)CONH_(2)` is a stronger base than `CH_(3)CONH_(2)(II)`. thus, the OVERALL basicity decreases in the order: IgtIIIgtII.


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