Electron-rich siloxaneplatinum complexes Synthesis, structures, and reactivity
Bibliographic record
Abstract
New platinasiloxanes were synthesized and their reactivity was studied. Oxidative addition of (HSiMe 2 ) 2 O to Pt(PEt 3 ) 3 led to dehydrogenation and quantitative formation of the four-membered platinacyclosiloxane [(PEt 3 ) 2 Pt((SiMe 2 ) 2 O)] which was characterized by X-ray diffraction. This complex was stable towards non-polar substrates and aerobic conditions, but reacted readily with electrophiles and Lewis acids. Reaction with MeI resulted in ring opening, while MeOTf gave an oxonium complex, with retention of the platinacycle structure. A complex resulting from BF 3 coordination to the ring oxygen atom was also obtained. An unprecedented open-chain diplatinasiloxane containing the PtSiOSiOSiPt fragment was formed by oxidative addition of HSiMe 2 OSiMe 2 OSiMe 2 H to Pt(PEt 3 ) 3 and it was characterized by X-ray diffraction.Key words: cyclosiloxane, metallacycle, platinum silyl, Lewis base, oxidative addition.
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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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.020 | 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".