Osmium(II)-Induced Rearrangement of Allenols for Metallafuran Complexes
Bibliographic record
Abstract
Osmafuran complexes in the form of cis-[Os(L∧L)2(C∧O)]+ (L∧L = 1,1-bis(diphenylphosphino)methane (dppm) or 2,2′-bipyridine (bpy); C∧O = [C(CH3)C(CH3)CRO]−, coordinating atoms in italics) were prepared from reactions between dichloro-Os(II) complexes cis-[Os(L∧L)2Cl2] and allenols H2C═C═C(CH3)(CH(R)(OH)) in alcoholic solvents. Rearrangement of allenolates H2C═C═C(CH3)(CH(R)(O–)) involving deprotonation of the secondary alcoholic carbon and protonation of the terminal allenic carbon was evident from the X-ray crystal structures of the resulting complexes. Density functional theory (DFT) calculations suggested a rearrangement mechanism involving Os–alkene intermediates cis-[Os(L∧L)2(H2C═CH–C(CH3)(═C(R)(O–)))]+ but not Os–hydride intermediates. Overall, these osmafurans are not directly derived from common metal–allene reaction patterns.
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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) | 0.010 | 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".