Coordination of KrF<sub>2</sub> to a Naked Metal Cation, Mg<sup>2+</sup>
Bibliographic record
Abstract
Abstract Examples of coordination compounds in which KrF 2 functions as a ligand are very rare. In contrast, XeF 2 provides a rich coordination chemistry with a variety of main‐group and transition metal cations. The reactions of Mg(AsF 6 ) 2 and KrF 2 in HF or BrF 5 solvent have afforded [Mg(KrF 2 ) 4 (AsF 6 ) 2 ] and [Mg(KrF 2 ) 4 (AsF 6 ) 2 ]⋅2 BrF 5 , respectively, the first examples of a metal cation ligated by KrF 2 . Their X‐ray crystal structures and Raman spectra show that the KrF 2 ligands and [AsF 6 ] − anions are F‐coordinated to a naked Mg 2+ cation. Quantum‐chemical calculations are consistent with essentially non‐covalent ligand‐metal bonding. These compounds significantly extend the XeF 2 –KrF 2 analogy and the limited chemistry of krypton by introducing a new class of coordination compound in which KrF 2 functions as a ligand towards a naked metal cation.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".