In the molecule, SF2, what is the correct steric number for sulfur and what is the molecular geometry for the molecule?

Question

Options:

 

SN = 2, linear
SN = 4, tetrahedral
SN = 3, bent
SN = 4, bent

Answer 1

The Lewis structure for SF₂ is:

 .. .. ..

:F-S-F:

 .. .. ..

 

Sulfur is bonded to two fluorine atoms, and has two lone pairs. This means that the steric number is 4.

 

Because of the two lone pairs, the electrons on the lone pairs will repel against the electrons in the bonds. This causes the geometry to bend (just like water).

 

SN = 4, bent