IUPAC name of `Coverset(-)Cl_(3)CHO` is

Options

A. Chloral
B. Trichloro acetaldehyde
C. 1, 1, 1 - trichloroethanal
D. 2, 2, 2- trichloroethanal

Answer

To determine the IUPAC name of the compound CCl3CHO, we can follow these steps:

### Step 1: Identify the Functional Group
The compound CCl3CHO contains the functional group -CHO, which indicates that it is an aldehyde. Aldehydes are characterized by the presence of a carbonyl group (C=O) at the end of the carbon chain.

**Hint:** Look for the functional group first to determine the type of compound.

### Step 2: Determine the Longest Carbon Chain
In CCl3CHO, there are two carbon atoms: one from the -CHO group and one from the carbon connected to the three chlorine atoms (CCl3). Therefore, the longest carbon chain consists of two carbon atoms.

**Hint:** Count the number of carbon atoms in the longest continuous chain.

### Step 3: Number the Carbon Chain
When numbering the carbon chain, we start from the end closest to the functional group (-CHO). Thus, the carbon with the aldehyde group is carbon 1, and the carbon with the three chlorine atoms is carbon 2.

**Hint:** Always number the chain from the end nearest to the functional group.

### Step 4: Identify Substituents
The substituent on carbon 2 is three chlorine atoms (CCl3). In IUPAC nomenclature, we denote multiple identical substituents using prefixes. Since there are three chlorine atoms, we use the prefix "trichloro."

**Hint:** Use the appropriate prefixes for multiple substituents.

### Step 5: Combine the Information
Now we can combine the information:
- The longest chain has 2 carbon atoms, which corresponds to the root name "eth."
- The substituent is "trichloro" at carbon 2.
- The suffix for the aldehyde functional group is "al."

Putting it all together, the IUPAC name of the compound is:
**2,2,2-trichloroethanal.**

### Final Answer
The IUPAC name of CCl3CHO is **2,2,2-trichloroethanal.**

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