Question

How will you convert
(i) ethyne to ethane
(ii) ethyne to acetaldehyde?

Answer 1

(i) $\underset{\mathrm{Ethyne}}{\mathrm{HC}\equiv \mathrm{CH}}+\underset{\mathrm{Ni}}{\overset{+H_2}{\to }}\underset{\mathrm{Ethene}}{H_{2}C={\mathrm{CH}}_2}\underset{\mathrm{Ni}}{\overset{+H_2}{\to }}\underset{\mathrm{Ethane}}{H_{3}C-{\mathrm{CH}}_3}$

(ii) $\underset{\mathrm{Ethyne}}{\mathrm{HC}\equiv \mathrm{CH}}+H_{2}O+\underset{\mathrm{Nascent}\mathrm{oxygen}}{\left[O\right]}\underset{H_2{\mathrm{SO}}_4}{\overset{{\mathrm{HgSO}}_4}{\to }}\underset{\mathrm{Acetaldehyde}}{{\mathrm{CH}}_3\mathrm{CHO}}$