Amines

1° - Amine produced isocyanide (iso nitrile) compound with CHCl₃ and KOH

$R-N{H}_2+CHC{l}_3+3KOH\to RNC+3KCl+3H_{2}O$

(A0

Mass of empty cylinder = 14.8 kg

Mass of cylinder when full = 29 kg

Mass of gas in cylinder when filled; W₁ = 29 – 14.8 = 14.2 kg

Mass of gas in cylinder after using, W₂ = 23 – 14.8 = 8.2 kg

Initial pressure ; P₁ = 3.47 atm

Final pressure ; P₂ =?

Using

  $PV=\frac{W}{M}RT$

$P_{1}V=\frac{W_1}{M}RT..........\left(I\right)$              

$P_{2}V=\frac{W_2}{M}RT...........\left(II\right)$                 

$\frac{P_1}{P_2}=\frac{W_1}{W_2}$                

$\frac{3.47}{P_2}=\frac{14.2}{8.2}$                

P₂ = atm

$C_2{H}_{7}N+\left(2x+\frac{y}{2}\right)CuO\to xC{O}_2+\frac{y}{2}{H}_{2}O+\frac{Z}{2}{N}_2+\left(2x+\frac{y}{2}\right)Cu$

$C_2{H}_7{N}_1+\left(2*2+\frac{7}{2}\right)CuO\to 2C{O}_2+\frac{7}{2}{H}_{2}O+\frac{1}{2}{N}_2+\left(2*2+\frac{7}{2}\right)Cu$              

$\therefore y=7$              

Ans. = 7

Dumas method,

Moles of N in N, N-dimethylaminopentane (C₇H₁₇N)

$=\frac{57.5}{115}=0.5mole$

$C_7{H}_{17}N+\frac{45}{2}CuO\to 7C{O}_2+\frac{17}{2}{H}_{2}O+\frac{1}{2}{N}_2+\frac{45}{2}Cu$

$\frac{n_{CuO}}{\left(\frac{45}{2}\right)}=\frac{n_{c_7{H}_{17}N}}{1}$

$n_{CuO}=\left(\frac{45}{2}\right)*0.5mol$

= 11.25 mol

= 1125 * 10^-2 mol

Ans. = 1125

The intermolecular association which is H-bonding is more prominent in case of primary amine as compared to secondary amines due to the availability of two hydrogen atom

Intermediate : R – N = C = O (Isocyanate)

(C) Carbylamine reaction ->Test for primary amine.

  $R-N{H}_{2}orAr-N{H}_2+CHC{l}_3+3KOH\to R-NCorAr-NC+3KCl+3H_{2}O$                    

(D) Hoffmann orientation -> Anti saytzeff (Formation of less substituted alkene as major product)

In Hofmann's degradation reaction, produced intermediate is carbine and alkyl and Aryl both type of group can be involved in migration process, during rearrangement.