Common name of compound : `CH_(2)=CH-overset(O)overset(||)(C)-H`

Options

A. Croton aldehyde
B. Acryl aldehyde
C. Propion aldehyde
D. Butyr aldehyde

Answer

To determine the common name of the compound `CH₂=CH-CHO`, we will follow these steps:

### Step 1: Identify the structure
The given compound can be broken down into its components:
- The `CH₂=CH` part indicates a double bond between two carbon atoms.
- The `CHO` part indicates the presence of an aldehyde functional group.

### Step 2: Count the carbon atoms
In total, the compound has three carbon atoms:
- Two from the `CH₂=CH` part (which is an alkene) and one from the `CHO` part (which is the aldehyde).

### Step 3: Determine the functional group
The functional group present in the compound is the aldehyde (`-CHO`). Aldehydes are named based on the longest carbon chain that includes the carbon of the aldehyde.

### Step 4: Naming the compound
Since the compound has three carbon atoms and an aldehyde functional group, we can name it based on the longest chain:
- The longest chain has three carbon atoms, which corresponds to "prop" (for propanal).
- However, since there is a double bond present, we need to modify the name to reflect that. The presence of a double bond in the alkene part leads us to use the prefix "acryl" for the compound.

### Step 5: Common name
The common name for this compound is "acrolein" or "acrylaldehyde". This name reflects both the aldehyde functional group and the presence of the double bond.

### Final Answer
The common name of the compound `CH₂=CH-CHO` is **acrolein** or **acrylaldehyde**.

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