Anionic Cyclopentadienyl C<sub>60</sub> Complexes of Molybdenum and Tungsten; The Strange Case of Iron
Bibliographic record
Abstract
Abstract Thermal and photochemical reactions of the carbonylate salts A[(η5‐C5H5)Fe(CO)2], A[(η5‐C5H5)Mo(CO)3] and A[(η5‐C5H5)W(CO)3] (A = Na, PPN) in THF with C60 result in all cases in electron transfer to give [C60]− and the transient 17‐electron, metal‐centered radicals CpFe(CO)2, CpMo(CO)3 and CpW(CO)3, respectively. Subsequent self‐coupling of the three metal‐centred radicals then results in the formation of the metal‐metal bonded dimers [CpFe(CO)2]2, [CpMo(CO)3]2 and [CpW(CO)3]2. In contrast, while the mixture of Na[C60] and [CpFe(CO)2]2 does not react further under photochemical conditions, photolysis of mixtures of Na[C60] and both [CpMo(CO)3]2 and [CpW(CO)3]2 ultimately results in complete homolysis of the dimers and regeneration of the corresponding metal‐centered radicals, which then combine with the [C60]− remaining in solution to form the η2‐C60 complexes A[CpMo(CO)2(η2‐C60] and A[CpW(CO)2(η2‐C60]. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
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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) | 0.003 | 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".