Synthesis, Structure, and Bonding of a Xe<sup>IV</sup> Transition‐Metal Coordination Complex, F<sub>3</sub>XeF<sub>b</sub>‐ ‐ ‐WOF<sub>4</sub>
Bibliographic record
Abstract
Abstract The coordination complex, F3XeFb‐ ‐ ‐WOF4, was synthesized in CFCl3 solvent by reaction of the weak fluoride‐ion donor and strong oxidative fluorinating agent, XeF4, with the moderate‐strength fluoride‐ion acceptor, WOF4. The compound is the only transition‐metal coordination complex of XeIV and was characterized at low temperatures by single‐crystal X‐ray diffraction and Raman spectroscopy. Xenon tetrafluoride and WOF4 coordinate trans to the W=O bond through a W‐ ‐ ‐Fb bond. The XeF3 moiety of F3XeFb‐ ‐ ‐WOF4 acquires a degree of [XeF3]+ character upon coordination that is reflected by its Xe−F stretching frequencies which are intermediate with respect to those of XeF4 and [XeF3]+. Calculations show W‐ ‐ ‐Fb is predominantly an electrostatic, σ‐hole bond with a significant orbital contribution that accounts for the bent Xe−Fb‐ ‐ ‐W angle. The calculations show F3XeFb‐ ‐ ‐MOF4 (M=Cr, Mo) are less stable than their W analogue, consistent with failed attempts to synthesize F3XeFb‐ ‐ ‐MoOF4.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 | 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 source (direct Gemma or distilled Codex), 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".