XeF<sub>2</sub> Coordination Complexes of the [BrO<sub>2</sub>]<sup>+</sup> Cation, [O<sub>2</sub>Br(FXeF)<sub><i>n</i></sub>][AsF<sub>6</sub>] (<i>n</i> = 1, 2) and [O<sub>2</sub>Br(FXeF)<sub>2</sub>][SbF<sub>6</sub>]; Their Syntheses and Structural Characterizations
Bibliographic record
Abstract
The syntheses and structural characterizations of the first XeF 2 coordination complexes of the [BrO 2 ] + cation are described. The reactions of [BrO 2 ][PnF 6 ] (Pn = As, Sb) with XeF 2 in anhydrous HF solvent yield the salts [O 2 Br(FXeF) n ][AsF 6 ] ( n = 1, 2) and [O 2 Br(FXeF) 2 ][SbF 6 ], which were characterized by low-temperature (LT) Raman spectroscopy and single-crystal X-ray diffraction (SCXRD). The XeF 2 ligands and [PnF 6 ] − coordinate to the Lewis acidic [BrO 2 ] + cation through primarily electrostatic Br V ---F Xe σ-hole bonds that result from coordination of the F atoms into regions of high positive electrostatic potential on the Br(V) atom and have bond trajectories that avoid the stereoactive valence electron lone-pair of Br(V). The complexes and their structural characterizations by LT Raman spectroscopy and SCXRD significantly extend the coordination chemistry of Br(V) and provide rare examples of a noble-gas difluoride coordinated to a strong oxidant main-group Lewis acid center.
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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 | 0.003 | 0.003 |
| Meta-epidemiology (narrow) | 0.007 | 0.007 |
| Meta-epidemiology (broad) | 0.006 | 0.003 |
| Bibliometrics | 0.002 | 0.008 |
| Science and technology studies | 0.005 | 0.004 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.006 | 0.004 |
| Research integrity | 0.006 | 0.007 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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; both teacher heads agree on what is shown here.
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".