Chapter 3, Problem 3.24P

a. Which has the longer axial $\text{P}—\text{F}$ distance, ${\text{PF}}_{\text{2}}{\left({\text{CH}}_{\text{3}}\right)}_{\text{3}}$ or ${\text{PF}}_{\text{2}}{\left({\text{CF}}_{\text{3}}\right)}_{\text{3}}$ ? Explain briefly.
b. A120 has oxygen as central atom. Predict the approximate bond angle in this molecule andexplain your answer.
c. Predict the structure of ${\text{CAl}}_{\text{4}}$ . (Seo X. Li, L-S. Wang, A. I. Boldyrev, J. Simons, J. Am.Chem. Soc., 1999, 121,6033.)