In the preparation of compounds of Xe, Bartlett had taken ${\mathrm{O}}_2^{+}{\mathrm{PtF}}_6^{-}$ as a base compound. This is because

In the preparation of compounds of Xe, Bartlett had taken ${\mathrm{O}}_2^{+}{\mathrm{PtF}}_6^{-}$ as a base compound. This is because both O₂ and Xe have almost same ionisation enthalpy.