Which of the following ions does not have S-S linkage?

Options

A. `S_(2)O_(8)^(2-)`
B. `S_(2)O_(6)^(2-)`
C. `S_(2)O_(5)^(2-)`
D. `S_(2)O_(3)^(2-)`

Answer

To determine which of the given ions does not have an S-S (sulfur-sulfur) linkage, we will analyze the structures of the four ions provided: S2O8^2-, S2O6^2-, S2O5^2-, and S2O3^2-.

### Step-by-Step Solution:

1. **Identify the Ions**:
- The ions in question are:
- S2O8^2-
- S2O6^2-
- S2O5^2-
- S2O3^2-

2. **Draw the Structure of S2O8^2-**:
- For S2O8^2-, the structure can be represented as:
- S=O
- O
- O
- S=O
- O
- O
- In this structure, there are no sulfur-sulfur linkages; instead, there are sulfur-oxygen linkages.

3. **Draw the Structure of S2O6^2-**:
- For S2O6^2-, the structure is:
- S=O
- O
- S=O
- O
- O
- Here, there is a sulfur-sulfur linkage present between the two sulfur atoms.

4. **Draw the Structure of S2O5^2-**:
- For S2O5^2-, the structure is:
- S=S
- O
- O
- O
- This structure also shows a sulfur-sulfur linkage.

5. **Draw the Structure of S2O3^2-**:
- For S2O3^2-, the structure can be represented as:
- S=O
- S=O
- O
- This structure contains a sulfur-sulfur linkage as well.

6. **Conclusion**:
- After analyzing the structures, we find that:
- S2O8^2- does not have a sulfur-sulfur linkage.
- S2O6^2-, S2O5^2-, and S2O3^2- all have sulfur-sulfur linkages.
- Therefore, the ion that does not have an S-S linkage is **S2O8^2-**.

### Final Answer:
The ion that does not have an S-S linkage is **S2O8^2-**.