Amines Test - 5...

Arrange the following in the decreasing order of the $$\displaystyle{pK}_b$$ values: 

A compound $$X$$ has molecular formula $${C}_{7}{H}_{7}NO$$. On treatment with $${Br}_{2}$$ and $$KOH$$, $$X$$ gives an amine $$Y$$. The later gives carbylamine test. $$Y$$ upon diazotisation and coupling with phenol gives an azo dye. Thus, $$X$$ is :

$$CH_3CH_2CH_2CN+2H_2\xrightarrow {Pd}$$

In the reduction of nitriles to prepare primary amine:

Identify the compounds from the following which form primary amines under suitable reduction conditions.
1. $$C_2H_5NC$$
2. $$C_2H_6$$
3. $$C_2H_5CONH_2$$
4. $$C_6H_5NO_2$$

Predict the product.
$$CH_3-CH_2-CN + H_2/Ni \rightarrow$$?

The reduction of nitrile gives ascent of amine series indicating:

Predict respectively $$'X'$$ and $$'Y'$$ in the following reactions
$$Ar-N{ H }_{ 2 }\xrightarrow { \quad \quad X\quad \quad  } Ar-\overset { + }{ N } \equiv N.{ Cl }^- \xrightarrow { \quad \quad Y\quad \quad  } $$$$Ar-Cl$$

In the given set of reactions, the IUPAC name of product $$Y$$ is:

Point out the correct decreasing order of $$pK_b$$ values of following amines:
$$C_2H_5NH_2 $$ , $$C_6H_5NHCH_3,$$ $$(C_2H_5)_2NH$$ and $$C_6H_5NH_2$$