text: what is the lewis formula of the pcl4+ ion ? phosphorus pentachloride exists in the solid state as the ionic compound [pcl4+][pcl6-]; it exists in the gas phase as the pci5 molecule. what is the lewis formula of the pcl4+ ion ? pcl4+ has 8 electrons (4 bonding pairs) in its outer level, and is tetrahedral in shape. the bond angle is 109.5 degrees (near enough).