The IUPAC name of the compound having the formula `"CC"l_(3)CH_(2)CHO` is

Options

A. 2,2, 2-trichloropropanal
B. 1,1, 1-trichloropropanal
C. 3,3, 3-trichloropropanal
D. 1,2, 1-dichloromethanal

Explanation

To determine the IUPAC name of the compound with the formula CCl3CH2CHO, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**:
The given formula is CCl3CH2CHO. This indicates that we have a carbon chain with three chlorine atoms (CCl3) attached to the second carbon of a three-carbon chain that ends with an aldehyde group (CHO).

2. **Draw the Compound**:
The structure can be drawn as follows:
```
Cl
|
Cl - C - CH2 - C = O
|
Cl
```
Here, the carbon chain consists of three carbon atoms, with the aldehyde group at one end.

3. **Number the Carbon Chain**:
According to IUPAC nomenclature rules, we start numbering from the end closest to the functional group. The aldehyde group (CHO) has the highest priority, so we number the carbon chain starting from the aldehyde:
- Carbon 1: CHO (aldehyde)
- Carbon 2: CH2
- Carbon 3: CCl3

Thus, the numbering is:
- C1: CHO
- C2: CH2
- C3: CCl3

4. **Identify the Carbon Chain Name**:
Since there are three carbon atoms in the longest chain, the base name will be "prop" (from propane).

5. **Identify and Name the Substituents**:
At carbon 3, we have three chlorine atoms. The substituent is named "trichloro" because there are three chlorine atoms.

6. **Combine the Names**:
When combining the substituent and the base name, we place the substituent name before the base name and indicate the position of the substituents. The aldehyde suffix is "al". Therefore, we combine them as follows:
- The full name becomes: "3,3,3-trichloropropanal".

### Final Answer:
The IUPAC name of the compound CCl3CH2CHO is **3,3,3-trichloropropanal**.