Arrange CCl3(CH2)3 NH2 (a), CCl3(CH2)2 NH2 (b) and CCl3 CH2 NH2 (c)in order of decreasing basic

step 1 Hello. Question is, arrange these compounds in decreasing basic nature. So we have to identify w

Arrange CCl3(CH2)3 NH2 (a), CCl3(CH2)2 NH2 (b) and CCl3 CH2...

Arrange $\mathrm{CCl}_3\left(\mathrm{CH}_2\right)_3 \mathrm{NH}_2$ (a), $\mathrm{CCl}_3\left(\mathrm{CH}_2\right)_2 \mathrm{NH}_2$ (b) and $\mathrm{CCl}_3 \mathrm{CH}_2 \mathrm{NH}_2$ (c)in order of decreasing basic nature. (a) C $>$ B $>$ A (b) C $>$ A $>$ B (c) A $>$ C $>$ B (d) B $>$ A $>$ C

Arrange $\mathrm{CCl}_3\left(\mathrm{CH}_2\right)_3 \mathrm{NH}_2$ (a), $\mathrm{CCl}_3\left(\mathrm{CH}_2\right)_2 \mathrm{NH}_2$ (b) and $\mathrm{CCl}_3 \mathrm{CH}_2 \mathrm{NH}_2$ (c)in order of decreasing basic nature.
(a) C $>$ B $>$ A
(b) C $>$ A $>$ B
(c) A $>$ C $>$ B
(d) B $>$ A $>$ C

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Key Concepts

Electron?Withdrawing Groups

Electron?withdrawing groups decrease the basicity of amines by pulling electron density away from the nitrogen atom, making its lone pair less available for protonation. In the context of basicity, groups such as CCl3 are particularly important because their strong inductive effect can significantly lower the electron density on the amine nitrogen.

Distance Dependence of the Inductive Effect

The inductive withdrawal of electron density by an electron?withdrawing group decreases with increasing distance from the functional group. In amines with a spacer chain, as the distance between the withdrawing group and the nitrogen increases, the deleterious effect on basicity is diminished, so the nitrogen retains more of its electron density and is more prone to accept protons.

Basicity of Amines

The basicity of an amine is determined by the availability of the lone pair on the nitrogen atom to bind a proton. Factors such as electron-donating or electron-withdrawing substituents and the steric environment around the nitrogen influence how readily the amine can accept a proton, with increased electron density leading to higher basicity.

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