Direct Detection of Pt(IV) Phenyl Complexes upon Intermolecular Oxidative Addition of Aryl Halides and Selective Csp<sup>3</sup>–I versus Csp<sup>2</sup>–Csp<sup>3</sup> and Csp<sup>3</sup>–Csp<sup>3</sup> Bonds Reductive Elimination from N-Heterocyclic Carbene Pt(IV) Phenyl Complexes
Bibliographic record
Abstract
Reaction of a chelating N-heterocyclic carbene Pt(II) dimethyl complex with phenyl iodide and excess KI results in the direct detection of a Pt(IV) phenyl intermediate by 1 H NMR spectroscopy. This finding provides experimental evidence that the reaction between Pt(II) dimethyl complexes and aryl halides proceeds via a concerted oxidative addition (OA) mechanism. Additionally, we report on the selective reductive elimination (RE) of Csp 3 –I vs Csp 2 –Csp 3 and Csp 3 –Csp 3 bonds. Lastly, OA, different RE pathways, and reactivity of different isomers were investigated by computational methods that are consistent with experimental observations. We believe that these results have important implications for the development of new Pt-catalyzed transformations.
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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 | 0.002 | 0.003 |
| Meta-epidemiology (narrow) | 0.003 | 0.003 |
| Meta-epidemiology (broad) | 0.004 | 0.001 |
| Bibliometrics | 0.002 | 0.004 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.001 | 0.003 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 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; 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".