Experimental study demonstrates the first coordination of KrF2 to a metal cation, indicating that krypton can act as a ligand for naked magnesium ions.
Examples of coordination compounds in which KrF₂ functions as a ligand are very rare. In contrast, XeF₂ provides a rich coordination chemistry with a variety of main-group and transition metal cations. The reactions of Mg(AsF₆ )₂ and KrF₂ in HF or BrF₅ solvent have afforded [Mg(KrF₂ )₄ (AsF₆ )₂ ] and [Mg(KrF₂ )₄ (AsF₆ )₂ ]⋅2 BrF₅ , respectively, the first examples of a metal cation ligated by KrF₂ . Their X-ray crystal structures and Raman spectra show that the KrF₂ ligands and [AsF₆ ]⁻ anions are F-coordinated to a naked Mg²⁺ cation. Quantum-chemical calculations are consistent with essentially non-covalent ligand-metal bonding. These compounds significantly extend the XeF₂ -KrF₂ analogy and the limited chemistry of krypton by introducing a new class of coordination compound in which KrF₂ functions as a ligand towards a naked metal cation.
No takes yet. Share an insight, caveat, or question.
Lozinšek et al. (2017) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: