Question

Consider the following reaction scheme.
$C_2{H}_{5}OH\underset{\text{Pyridine}}{\overset{SOC{l}_2}{\to }}A\stackrel{KCN(alc.)}{\to }B\stackrel{2H_{2}O/H^{+}}{\to }C$

Find (A) along with byproducts.
[1 Mark]

• A. $C_2{H}_{4}C{l}_2,S{O}_2,HCl$
• B. $C_2{H}_{5}Cl,S{O}_2,HCl$
• C. $C_2{H}_{5}Cl,SOCl,HCl$
• D. $C_2{H}_4,S{O}_2,C{l}_2$

Answer 1

The correct option is B $C_2{H}_{5}Cl,S{O}_2,HCl$

$C_2{H}_{5}OH\underset{\text{Pyridine}}{\overset{SOC{l}_2}{\to }}\underset{\left(A\right)}{C_2{H}_{5}Cl}\stackrel{\text{(alc.)}KCN}{\to }\underset{\left(B\right)}{C_2{H}_{5}CN}$

$\underset{\left(B\right)}{C_2{H}_{5}CN}\underset{\text{Heat}}{\overset{2H_{2}O/H^{+}}{\to }}\underset{\left(C\right)}{C_2{H}_{5}COOH}$