Embibe Experts Solutions for Chapter: Amines, Exercise 4: Exercise-4

Which is most basic in aqueous solution?

Base strength is in the order of

$\left(\mathrm{i}\right) {\mathrm{CH}}_3\overline{\mathrm{C}}{\mathrm{H}}_2$ $\left(\mathrm{ii}\right) {\mathrm{H}}_2\mathrm{C}=\stackrel{⊝}{\mathrm{C}}\mathrm{H}$ and $\left(\mathrm{iii}\right) \mathrm{H}-\mathrm{C}\equiv \stackrel{⊝}{\mathrm{C}}$

The proper tautomeric structure for $2$-aminopyridine $\left(\mathrm{X}\right)$ is:

Choose the most appropriate pair of nitrogens that gets protonated in the following structures:

As the base changes from ${\mathrm{RNH}}_2$ to ${\mathrm{R}}_2\mathrm{NH},$ to ${\mathrm{R}}_3\mathrm{N}$ the basicity:

In the following sequence:

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}\stackrel{\mathrm{NaCN}}{⟶}\left(\mathrm{i}\right)$

$\left(\mathrm{i}\right)\stackrel{\mathrm{Ni}/{\mathrm{H}}_2}{⟶} \left(\mathrm{ii}\right)$

$\left(\mathrm{ii}\right)\stackrel{ \mathrm{acetic} \mathrm{anhydride} }{⟶} \left(\mathrm{iii}\right)$

Product $\left(\mathrm{iii}\right)$ is :

The compound which on reaction with aqueous nitrous acid at low temperature produces an oily nitrosamine is

Starting from propanoic acid, the following reactions were carried out: Propanoic acid $\stackrel{{\mathrm{SOCl}}_2}{⟶}\mathrm{X}\stackrel{{\mathrm{NH}}_3}{⟶}\mathrm{Y}\stackrel{{\mathrm{Br}}_2+\mathrm{KOH}}{⟶}\mathrm{Z}$. What is the compound $\mathrm{Z}$?