Decomplexation of Cyclopentadienylmanganese Tricarbonyls under Very Mild Conditions: A Novel Route to Substituted Cyclopentadienes and Their Application in Organometallic Synthesis
Bibliographic record
Abstract
Photolysis of cyclopentadienylmanganese tricarbonyl derivatives in the presence of a proton source leads to decomplexation and formation of the free cyclopentadiene in excellent yield. In contrast, attempted decomplexation using Ce(IV) or Fe(III) leads merely to decomposition products. It is proposed that, upon photolytic loss of a CO ligand, coordination of methanol or water facilitates an intramolecular proton transfer to the cyclopentadienyl ring. This method is applicable to polyfunctional molecules such as ethynylestradiol. In this new synthetic approach, these cymantrenes have also been used as precursors to the corresponding iron, tungsten, titanium, and rhenium complexes via the generation of the intermediate cyclopentadienes.
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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) | 0.002 | 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".