Ligation kinetics as a probe for gas-phase ligand field effects: Ligation of atomic transition metal cations with ammonia at room temperature
| Autor: | Voislav Blagojevic, Gregory K. Koyanagi, Diethard K. Bohme, Vitali V. Lavrov |
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| Rok vydání: | 2019 |
| Předmět: |
Ligand field theory
010401 analytical chemistry Kinetics General Medicine 010402 general chemistry Photochemistry 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Gas phase Ammonia chemistry.chemical_compound Transition metal chemistry Physics::Atomic and Molecular Clusters Physics::Chemical Physics Ligation Spectroscopy |
| Zdroj: | European Journal of Mass Spectrometry. 25:44-49 |
| ISSN: | 1751-6838 1469-0667 |
| DOI: | 10.1177/1469066718800844 |
| Popis: | The kinetics of ammonia ligation to atomic first and second row transition metal cations were measured in an attempt to assess the role of ligand field effects in gas-phase ion-molecule reaction kinetics. Measurements were performed at 295 ± 2 K in helium bath gas at 0.35 Torr using an inductively coupled plasma/selected-ion flow tube tandem mass spectrometer. The atomic cations were produced at ca. 5500 K in an inductively coupled plasma source and were allowed to decay radiatively and to thermalize by collisions with argon and helium atoms prior to reaction. A strong correlation was observed across the periodic table between the measured rate coefficients for ammonia ligation and measured/calculated bond dissociation energies. A similar strong correlation is seen with the ligand field stabilization energy. So ligand field stabilization energies should provide a useful predictor of relative rates of ligation of atomic metal ions. |
| Databáze: | OpenAIRE |
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