Question

Compound X on reaction with O₃ followed by \(\frac{Zn}{H_2O}\) gives formaldehyde and 2-methyl propanal as products. The compound X is:

• A. 3 -Methylbut -1-ene
• B. 2-Methylbut -1-ene
• C. 2-Methylbut - 2-ene
• D. Pent - 2- ene

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Reductive ozonolysis of an alkene cleaves the double bond and adds an oxygen atom to each of the two formerly double-bonded carbons, forming aldehydes or ketones.
Detailed Explanation:
The products are Formaldehyde (\(HCHO\)) and 2-Methylpropanal (\((CH_{3})_{2}CH-CHO\)).
To find the parent alkene, remove the oxygen atoms and join the two carbonyl carbons with a double bond.
Product 1: \(CH_{2}=O\)
Product 2: \(O=CH-CH(CH_{3})_{2}\)
Joining them: \(CH_{2}=CH-CH(CH_{3})_{2}\)
The structure is \(CH_{2}=CH-CH(CH_{3})_{2}\), which is 3-Methylbut-1-ene.
Step 2: Final Answer:
Compound X is 3-Methylbut-1-ene. Option (1) is correct.