Carboxylic Acids and their Derivatives 2 Question 45
45. In the following reactions, identify the compounds $A, B, C$ and $D$.
(i) $\mathrm{PCl}{5}+\mathrm{SO}{2} \longrightarrow A+B$
(ii) $A+\mathrm{CH}{3} \mathrm{COOH} \longrightarrow C+\mathrm{SO}{2}+\mathrm{HCl}$
(iii) $2 \mathrm{C}+\left(\mathrm{CH}{3}\right){2} \mathrm{Cd} \longrightarrow 2 \mathrm{D}+\mathrm{CdCl}_{2}(1994,1 \mathrm{M} \times 4=4 \mathrm{M})$
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Solution:
- (i) $\mathrm{PCl}{5}+\mathrm{SO}{2} \longrightarrow \underset{B}{\mathrm{POCl}{3}}+\underset{A}{\mathrm{SOCl}{2}}$
(ii) $\mathrm{SOCl}{2}+\mathrm{CH}{3} \mathrm{COOH} \longrightarrow \mathrm{CH}{3} \mathrm{COCl}+\mathrm{SO}{2}+\mathrm{HCl}$
$(A)$
(iii)
