Cyclic allotropes of sulfur containing up to 20 sulfar atoms have been isolated

Question

Cyclic allotropes of sulfur containing up to 20 sulfar atoms have been isolated and characterized. Propose a reason why the bond angle in Sn (where n = 10, 12, 18, and 20) are all close to 106o

1. The bond angles in all sulfur compounds are always 106 degrees

2. Bond angle depends on the hybridization, which is the same for all of the allotropes of sulfur.

3. Rings with an even number of atoms always have 106 degree bond angles

4. The expanded octet of sulfur creates a bond angle slightly lower than the normal tetrahedral hond angle.

Explanation / Answer

answer : 4. The expanded octet of sulfur creates a bond angle slightly lower than the normal tetrahedral hond angle.

in tetehedral geometry ingenerall bond angle is 1090 28' .

if any deviation from this is due to because of its sturucture.

S can expand it octet it is due to availability of empty d- orbitals present in this sulfur. when it expand its octahedral structure its bond angle slightly lower than normal tetrahedral angle 1090 28' .

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