Question

Which of the following correctly represents the bond angle and bond length in the crown-shaped \( S_8 \) molecule?

• A. Bond angle \( \approx 120^\circ \), Bond length \( \approx 154 \, \text{pm} \)
• B. Bond angle \( \approx 109.5^\circ \), Bond length \( \approx 140 \, \text{pm} \)
• C. Bond angle \( \approx 108^\circ \), Bond length \( \approx 204 \, \text{pm} \)
• D. Bond angle \( \approx 98^\circ \), Bond length \( \approx 205 \, \text{pm} \)

Hint:

In crown-shaped molecules like \( S_8 \), bond angles tend to be slightly less than \( 109.5^\circ \), and the bond lengths are typically longer compared to small molecules due to the larger atomic radius of sulfur.

Answer 1

The Correct Option is C

The \( S_8 \) molecule has a crown-shaped structure where sulfur atoms are connected in a puckered ring. The bond angle in this structure is approximately \( 108^\circ \), typical for a bent or puckered structure. The bond length is approximately \( 204 \, \text{pm} \), which is typical for sulfur-sulfur single bonds in this molecule. - Option (A) is incorrect because a bond angle of \( 120^\circ \) is too large for this structure.
- Option (B) is incorrect as the bond length is too short for sulfur atoms in this configuration.
- Option (D) is incorrect because the bond angle \( 98^\circ \) is too small for the \( S_8 \) molecule. Therefore, the correct answer is option (C).