Chair form of `S_(6)` rings are present in

Options

A. `alpha-` sulphur
B. `beta-` sulphur
C. Engle's sulphur
D. `gamma-` sulphur

Answer

To solve the question regarding the chair form of S6 rings, we will analyze the information step by step.

### Step-by-Step Solution:

1. **Understanding the Structure of S6 Rings**:
- The question asks about the chair form of S6 rings. S6 refers to a cyclic structure made up of six sulfur (S) atoms.
- The chair form is a common representation of cyclic compounds, similar to the chair conformation of cyclohexane.

2. **Identifying the Options**:
- The options provided in the question include different configurations of sulfur rings, specifically alpha-alpha, beta-alpha, and gamma-alpha configurations.
- Each of these configurations can potentially lead to different types of sulfur rings.

3. **Analyzing Each Configuration**:
- **Alpha-alpha Configuration**: This configuration can lead to the formation of an S8 ring, which consists of eight sulfur atoms arranged in a cyclic structure.
- **Beta-alpha Configuration**: Similar to the alpha-alpha, this configuration also leads to the formation of an S8 ring.
- **Gamma-alpha Configuration**: This configuration also results in an S8 ring.

4. **Conclusion on S6 Rings**:
- The chair form of S6 rings is specifically mentioned, and it is concluded that the S6 rings can be represented as S4 in the chair form.
- Therefore, the correct answer to the question is option C, which states that the chair form of S6 rings corresponds to S4.

### Final Answer:
The chair form of S6 rings is present in **option C**.

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