Predict, giving reasons, the order of basicity of the following compou

1.	Predict, giving reasons, the order of basicity of the following compounds in (i)gaseous phase and (ii) in aqueous solutions(CH3)3N, (CH3)2(NH), CH3NH2, NH3
Answer» In gaseous phase, basic character of amines increases with increases in number of electron releasing groups, due to + I effect, so trend of basic character is 3° > 2° > 1°. But in aqueous phase, salvation of ammonium cation occurs by water molecules, greater the size of ion, lesser will be the salvation, and lesser will be the stability of ion, so on combining + I effect and salvation effect, in aqueous phase trend changes to 2° > 3° > 1°.

Predict, giving reasons, the order of basicity of the following compounds in (i)gaseous phase and (ii) in aqueous solutions(CH3)3N, (CH3)2(NH), CH3NH2, NH3

Answer»

In gaseous phase, basic character of amines increases with increases in number of electron releasing groups, due to + I effect, so trend of basic character is 3° > 2° > 1°.

But in aqueous phase, salvation of ammonium cation occurs by water molecules, greater the size of ion, lesser will be the salvation, and lesser will be the stability of ion, so on combining + I effect and salvation effect, in aqueous phase trend changes to 2° > 3° > 1°.

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Predict, giving reasons, the order of basicity of the following compounds in (i)gaseous phase and (ii) in aqueous solutions(CH3)3N, (CH3)2(NH), CH3NH2, NH3

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