Which among the following is a correct order | vedclass

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(C) The basic strength of amines in the aqueous phase depends on the inductive effect,solvation effect,and steric hindrance. For aliphatic amines wher

Vedclass · Accepted Answer

$NH_3 > RNH_2 > R_3N > R_2NH$

Vedclass · Answer

(C) The basic strength of amines in the aqueous phase depends on the inductive effect,solvation effect,and steric hindrance. For aliphatic amines where $R = CH_3$,the order of basicity is $(CH_3)_2NH > CH_3NH_2 > (CH_3)_3N > NH_3$. Since $pK_b = -\log(K_b)$,a higher basic strength corresponds to a lower $pK_b$ value. Therefore,the order of $pK_b$ values is the reverse of the basicity order: $NH_3 > (CH_3)_3N > CH_3NH_2 > (CH_3)_2NH$. However,in general terms for alkyl amines,the order of basicity is $R_2NH > RNH_2 > R_3N > NH_3$. Thus,the correct order of $pK_b$ values is $NH_3 > R_3N > RNH_2 > R_2NH$.

Which among the following is a correct order of $pK_b$ values of amines in the aqueous phase?

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