The IUPAC name of acryaldehyde is

Options

A. Prop-2-enal
B. Propenylaldehyde
C. But-2-enal
D. butenal

Explanation

To determine the IUPAC name of acrylaldehyde, follow these steps:

### Step 1: Identify the Structure
Acrylaldehyde has the following structure:
- It contains a carbonyl group (C=O) which indicates that it is an aldehyde.
- The structure can be represented as:
```
CH2=CH-CHO
```
Here, CHO is the aldehyde group and the CH2=CH part indicates a double bond between the first and second carbon atoms.

### Step 2: Count the Carbon Atoms
Count the total number of carbon atoms in the longest continuous chain:
- In this case, there are three carbon atoms (C1, C2, and C3).

### Step 3: Number the Carbon Chain
Number the carbon chain starting from the end nearest to the aldehyde group:
- The numbering would be as follows:
- C1: CHO (aldehyde group)
- C2: CH (part of the double bond)
- C3: CH2 (part of the double bond)

### Step 4: Identify the Functional Groups and Their Positions
- The aldehyde functional group is at position 1 (C1).
- There is a double bond between C2 and C3.

### Step 5: Assign the Name
According to IUPAC nomenclature:
- The base name for a three-carbon chain is "prop".
- Since there is a double bond at position 2, we use the prefix "prop-2-".
- Since it is an aldehyde, we add the suffix "-al".

### Final IUPAC Name
Combining all the parts, the IUPAC name of acrylaldehyde is:
- **Prop-2-enal**