Question

Carbon suboxide $\left(C_3{O}_2\right)$ may be obtained by heating:

• A. Malonic acid with $P_4{O}_{10}$
• B. Malic acid with $P_4{O}_{10}$
• C. Oxalic acid strongly
• D. Maleic acid with $P_4{O}_{10}$

Answer 1

The correct option is A Malonic acid with $P_4{O}_{10}$

$\underset{\text{(Malonic Acid)}}{3HOOC-C{H}_2-COOH}\underset{150{}^{\circ }C}{\overset{P_4{O}_{10}}{\to }}\underset{\text{Carbon Suboxide}}{3O=C=C=C=O}+4H_{3}P{O}_4$