Chapter 3, Problem 101AP

(a) Predict the geometry of the ${\text{SbCl}}_{\text{5}}^{\text{2}-}$ ion, using the VSEPR method.

(b) The ion ${\text{SbCl}}_{\text{6}}^{\text{3}-}$ is prepared from ${\text{SbCl}}_{\text{5}}^{\text{2}-}$ by treatment with ${\text{Cl}}^{-}$ . Determine the steric number of the central antimony atom in this ion, and discuss the extension of the VSEPR theory that would be needed for the prediction of its molecular geometry.