Question

One mole of alkene on ozonolysis gave one mole of acetate aldehyde and one mole of acetone. IUPAC name of \(X\) is

• A. \(2\)-methyl-\(2\)-butene
• B. \(2\)-methyl-\(1\)-butene
• C. \(2\)-butene
• D. \(1\)-butene

Hint:

Reconstruct alkene by joining carbonyl carbon atoms and replacing \(C=O\) with \(C=C\). Products indicate substituents on each alkene carbon.

Answer 1

The Correct Option is A

Step 1: Use ozonolysis rule.
Ozonolysis breaks the double bond and converts both carbon atoms of double bond into carbonyl groups.
Step 2: Identify products.
Products are:
- Acetaldehyde: \(CH_3CHO\)
- Acetone: \(CH_3COCH_3\)
Step 3: Reconstruct the alkene.
Acetaldehyde comes from a carbon having \(CH_3\) and \(H\).
Acetone comes from a carbon having two \(CH_3\) groups.
Thus alkene must be:
\[ (CH_3)_2C = CHCH_3 \]
Step 4: Name the alkene.
This is \(2\)-methyl-\(2\)-butene.
Final Answer:
\[ \boxed{2\text{-methyl-}2\text{-butene}} \]