Chapter 2, Problem 20P

State whether you expect the following speciesto possess stereoisomers and, if so, draw their structures and give them distinguishing labels (a) ${\text{BF}}_2\text{Cl}$; (b) ${\text{POCl}}_3$; (c) ${\text{MePF}}_4$; (d) ${\left[{\text{PF}}_2{\text{Cl}}_4\right]}^{-}$.