Which of the following does not contain a symmetrical structure ?

Options

A. `H_(2)S_(2)O_(4)`
B. `H_(2)S_(2)O_(5)`
C. `H_(2)S_(2)O_(8)`
D. `H_(2)S_(2)O_(6)`

Answer

To determine which of the given molecules does not contain a symmetrical structure, we will analyze the structures of each molecule step by step.

### Step 1: Analyze H2S2O4
1. **Structure**: The molecular structure of H2S2O4 can be visualized as:
- Two sulfur atoms (S) connected to each other.
- Each sulfur atom is bonded to two oxygen atoms (O) with double bonds and two hydroxyl groups (OH).
2. **Symmetry Check**: When we draw this structure, we can see that if we draw a line down the middle, both halves are identical.
3. **Conclusion**: H2S2O4 has a symmetrical structure.

### Step 2: Analyze H2S2O5
1. **Structure**: The structure of H2S2O5 can be visualized as:
- One sulfur atom bonded to two hydroxyl groups (OH).
- It has a central oxygen atom connected to two sulfur atoms, each of which is double bonded to oxygen.
2. **Symmetry Check**: When we analyze this structure, we notice that if we draw a line down the middle, the arrangement of atoms on either side is not identical due to the presence of a single oxygen atom that disrupts symmetry.
3. **Conclusion**: H2S2O5 does not have a symmetrical structure.

### Step 3: Analyze H2S2O8
1. **Structure**: The structure of H2S2O8 can be visualized as:
- Two sulfur atoms connected to four oxygen atoms, with each sulfur also bonded to a hydroxyl group (OH).
2. **Symmetry Check**: When we draw this structure, we can see that if we divide it down the middle, both halves are identical.
3. **Conclusion**: H2S2O8 has a symmetrical structure.

### Step 4: Analyze H2S2O6
1. **Structure**: The structure of H2S2O6 can be visualized as:
- Two sulfur atoms connected to each other, with each sulfur bonded to oxygen and hydroxyl groups.
2. **Symmetry Check**: When we analyze this structure, we can see that if we draw a line down the middle, both halves are identical.
3. **Conclusion**: H2S2O6 has a symmetrical structure.

### Final Conclusion
After analyzing all four molecules, we find that the molecule that does not contain a symmetrical structure is **H2S2O5**.