Question

In which cases do you expect deviations from the idealized bond angle?

A. PBr₃
B. CS₂
C. SCl₂
D. CH₃F

Answer 1

Deviations from the idealized bond angle can occur when there are lone pairs of electrons present.

Step-by-step explanation:

According to the VSEPR model, deviations from the idealized bond angle can occur when there are lone pairs of electrons present. In the case of PBr₃ (phosphorus tribromide), SCl₂ (sulfur dichloride), and CH₃F (methyl fluoride), there are lone pairs of electrons on the central atoms. These lone pairs cause repulsion, resulting in a decrease in the bond angle. For CS₂ (carbon disulfide), there are no lone pairs and the molecule has a linear geometry, so there are no deviations from the idealized bond angle.