Dative versus electron-sharing bonding in the isoelectronic argon compounds ArR⁺ (R = CH₃, NH₂, OH, and F)

For the series of isoelectronic ArR+ (R = CH3, NH2, OH, and F) complexes, the nature of the bonding between Ar and R shifts from an Ar → R+ dative σ bond in ArCH3+ and ArNH2+ to an Ar+–R electron-sharing σ bond in ArOH+ and ArF+.