The structures for the phosphorus chlorides are invariably consistent with VSEPR theory. The structure of PCl<sub>5</sub> depends on its environment. Gaseous and molten PCl<sub>5</sub> is a neutral molecule with trigonal bipyramidal (D<sub>3h</sub>) symmetry. The hypervalent nature of this species (as well as for PCl, see below) can be explained with three-center four-electron bonding model. This trigonal bipyramidal structure persists in non-polar solvents, such as CS<sub>2</sub> and CCl<sub>4</sub>.
In solutions of polar solvents, PCl<sub>5</sub> undergoes... Read More