Question

Propanal and pentan-3- one are the ozonolysis products of an alkene. What is the structural formula of alkene?

• A. $C{H}_3{CH}_2-\underset{\underset{C{H}_{2}C{H}_3}{|}}{C}=CH-{CH}_2{CH}_3$
• B. $C{H}_3{CH}_2-CH=CH-\stackrel{\stackrel{C{H}_{2}C{H}_3}{|}}{CH}-{CH}_3$
• C. ${CH}_3-\underset{\underset{C{H}_{2}C{H}_3}{|}}{C}=\stackrel{\stackrel{C{H}_{2}C{H}_3}{|}}{C}-{CH}_3$
• D. $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_2-CH=CH-C{H}_{2}C{H}_3$

Answer 1

Answer: (A)

$C{H}_3{CH}_2-\underset{\underset{C{H}_{2}C{H}_3}{|}}{C}=CH-{CH}_2{CH}_3$

When 3-ethylhex-3-ene reacts with ozone followed by treatment with Zn and $H_{2}O$, it will form propanal and pentan-3-one.

Thus ozonolysis of 3-Ethylhex-3-ene gives propanal and pentan-3-one.

The structural formula of this alkene is:

Correct option is A.