Total number of stereoisomers of given compound will be
`CH_(3)-underset(Cl)underset(|)(CH)-underset(Cl)underset(|)(CH)-underset(Cl)underset(|)(CH)-CH_(3)`

Options

A. 2
B. 4
C. 6
D. 8

Answer

To determine the total number of stereoisomers for the compound 2,3,4-trichloropentane, we will follow these steps:

### Step 1: Identify the Structure
The compound is 2,3,4-trichloropentane, which means it has a five-carbon chain (pentane) with chlorine substituents at the 2nd, 3rd, and 4th carbon atoms.

### Step 2: Identify Chiral Centers
A chiral center is a carbon atom that is bonded to four different groups. In this compound, we need to identify which carbon atoms are chiral:
- **C-2**: This carbon is bonded to a chlorine atom, a hydrogen atom, a carbon chain (C-1), and another carbon chain (C-3). Thus, it is a chiral center.
- **C-3**: This carbon is bonded to a chlorine atom, a hydrogen atom, a carbon chain (C-2), and another carbon chain (C-4). Thus, it is also a chiral center.
- **C-4**: This carbon is bonded to a chlorine atom, a hydrogen atom, a carbon chain (C-3), and a carbon chain (C-5). Thus, it is a chiral center.

So, we have identified **three chiral centers** in the compound.

### Step 3: Calculate the Number of Stereoisomers
The formula to calculate the number of stereoisomers based on the number of chiral centers (n) is:
\[ \text{Number of stereoisomers} = 2^n \]

For our compound:
- \( n = 3 \) (since there are three chiral centers)

Thus, the number of stereoisomers is:
\[ 2^3 = 8 \]

### Step 4: Consider Meso Compounds
However, we need to check if there are any meso compounds present. Meso compounds are achiral and have an internal plane of symmetry. In this case, the presence of symmetry in some configurations may reduce the total count of stereoisomers.

After analyzing the possible configurations, we find that there are two meso compounds among the eight stereoisomers.

### Step 5: Final Count of Stereoisomers
Taking into account the meso compounds, the total number of unique stereoisomers is:
\[ 8 - 2 = 6 \]

### Conclusion
The total number of stereoisomers for 2,3,4-trichloropentane is **6**.

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