Question

Total number of compounds with Chiral carbon atoms from following is ________.

$\text{CH}_3 - \text{CH}_2 - \text{CH(NO}_2\text{) - COOH} \\ \text{CH}_3 - \text{CH}_2 - \text{CHBr - CH}_2 - \text{CH}_3 \\ \text{CH}_3 - \text{CH(I) - CH}_2 - \text{NO}_2 \\ \text{CH}_3 - \text{CH}_2 - \text{CH(OH) - CH}_2\text{OH} \\$

Answer 1

Correct Answer: 5

To identify chiral carbons, examine carbon atoms with four different substituents, which render them asymmetric:

Step 1. CH₃–CH₂–CH(NO₂)–COOH: The second carbon is chiral due to four distinct substituents.
Step 2. CH₃–CH₂–CHBr–CH₂–CH₃: The third carbon is chiral, as it has four different substituents.
Step 3. CH₃–CH(I)–CH₂–NO₂: The second carbon is chiral due to its four different groups.
Step 4. CH₃–CH₂–CH(OH)–CH₂OH: The third carbon is chiral, as it has four distinct substituents.
Step 5. CH₃–CH–CH(I)–C₂H₅: The second carbon is chiral due to four different substituents.

Thus, there are five compounds containing chiral carbons.
The Correct answer is: 5