Question

What is IUPAC name of acrolein?

• A. Prop-2-en-al
• B. 2-methyl but-2-en-al
• C. 3-methyl but-2-en-al
• D. But-2-en-al

Hint:

The IUPAC name for acrolein is Prop-2-en-al, reflecting its structure with a propene backbone and an aldehyde group.

Answer 1

The Correct Option is A

Step 1: Identifying the structure of acrolein.
Acrolein is an aldehyde with the structure \( \text{CH}_2 = \text{CH} - \text{CHO} \). The IUPAC name is derived based on the position of the double bond and the aldehyde group.
Step 2: Analyzing the options.
(A) Prop-2-en-al: Correct — This is the IUPAC name of acrolein, where the double bond is between carbon 2 and 3, and the aldehyde is at carbon 1.
(B) 2-methyl but-2-en-al: Incorrect, this is a different structure.
(C) 3-methyl but-2-en-al: Incorrect, this is not the correct name for acrolein.
(D) But-2-en-al: Incorrect, this structure does not match acrolein.
Step 3: Conclusion.
The correct answer is (A) Prop-2-en-al.