[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a phosphorus hydride consisting of a single pentavalent phosphorus carrying five hydrogens. The parent hydride of the phosphorane class. It is a member of phosphoranes, a phosphorus hydride and a mononuclear parent hydride."}, {"from": "gpt", "value": "[PH4+1]"}]