Xenon Trioxide Adducts of <i>O</i> ‐Donor Ligands; [(CH <sub>3</sub> ) <sub>2</sub> CO] <sub>3</sub> XeO <sub>3</sub> , [(CH <sub>3</sub> ) <sub>2</sub> SO] <sub>3</sub> (XeO <sub>3</sub> ) <sub>2</sub> , (C <sub>5</sub> H <sub>5</sub> NO) <sub>3</sub> (XeO <sub>3</sub> ) <sub>2</sub> , and [(C <sub>6</sub> H <sub>5</sub> ) <sub>3</sub> PO] <sub>2</sub> XeO <sub>3</sub>
Bibliographic record
Abstract
Abstract Xenon trioxide (XeO 3 ) forms adducts with triphenylphosphine oxide, dimethylsulfoxide, pyridine‐ N ‐oxide, and acetone by coordination of the ligand oxygen atoms to the Xe VI atom of XeO 3 . The crystalline adducts were characterized by low‐temperature, single‐crystal X‐ray diffraction, and Raman spectroscopy. Unlike solid XeO 3 , which detonates when mechanically or thermally shocked, solid (C 5 H 5 NO) 3 (XeO 3 ) 2 , [(C 6 H 5 ) 3 PO] 2 XeO 3 , and [(CH 3 ) 2 SO] 3 (XeO 3 ) 2 are insensitive to mechanical shock. The [(CH 3 ) 2 SO] 3 (XeO 3 ) 2 adduct slowly decomposes over several days to (CH 3 ) 2 SO 2 , Xe, and O 2 . All three complexes undergo rapid deflagration when ignited by a flame. Both [(C 6 H 5 ) 3 PO] 2 XeO 3 and (C 5 H 5 NO) 3 (XeO 3 ) 2 are room‐temperature stable and the [(CH 3 ) 2 CO] 3 XeO 3 complex dissociates at room temperature to form a stable solution of XeO 3 in acetone. The xenon coordination sphere of [(C 6 H 5 ) 3 PO] 2 XeO 3 , a distorted square‐pyramid, provides the first example of a five‐coordinate XeO 3 complex with only two Xe‐ ‐ ‐O adduct bonds. The xenon coordination spheres of the remaining adducts are distorted octahedra, comprised of three Xe‐ ‐ ‐O secondary bonds that are approximately trans to the primary Xe−O bonds of XeO 3 . Quantum‐chemical calculations were used to assess the nature of the Xe‐ ‐ ‐O adduct bonds, which are described as predominantly electrostatic bonds between the nucleophilic oxygen atoms of the bases and the σ‐holes of the electrophilic xenon atoms.
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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".