Enhancing Reactivity of Directly íObservable B–H–Pt Interactions through Conformational Rigidity
Bibliographic record
Abstract
We report for the first time the direct syntheses of trimethylplatinum(IV) complexes supported by bis(pyrazolyl)dihydridoborate (Bp) and bis(3,5‐dimethylpyrazolyl)dihydridoborate (Bp*) ligands from the corresponding dimethylplatinum(II) complexes. X‐ray crystallographic and multinuclear NMR characterization of the trimethylplatinum(IV) complexes reveal agostic B–H–Pt interactions. Solid‐state analysis reveals that BpPt IV Me 3 adopts a dinuclear structure featuring an intermolecular B–H–Pt bridge, whereas Bp*Pt IV Me 3 adopts a mononuclear structure containing an intramolecular B–H–Pt bridge. Addition of acetonitrile leads to cleavage of the weakly coordinating B–H–Pt interactions, and in the case of Bp*Pt IV Me 3 , leads to hydroboration of acetonitrile. The B–H fragment interacting with the Pt IV center in Bp*Pt IV Me 3 was also found to react with methanol to form a methoxy‐bridged complex. DFT calculations were employed to investigate the structural contributions to the difference in the reactivity of the Bp‐ and Bp*‐supported complexes.
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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 | 0.001 | 0.001 |
| 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.011 | 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".