Guided ion-beam and theoretical studies of the reaction of Os+ (6D) with O2: Adiabatic and nonadiabatic behavior

- The Os+(6D) + O2 reaction is examined by guided ion-beam tandem mass spectrometry.
- The bond energy of OsO+ is determined as 4.96 ± 0.02 eV.
- Formation of OsO2+ is observed as the sequential exothermic reaction of OsO+ with O2.
- The nature of the bonding for OsO+ and OsO2+ is explored theoretically.
- Explanations for the unusual two features in the OsO+ cross section are explored.