New methods for the synthesis of transition-metal fullerene complexes
Bibliographic record
Abstract
Abstract Buckminsterfullerene, C 60 , is readily reduced on exposure to solutions of strongly reducing transition-metal carbonylate anions to give the radical anion fulleride C 60 - and the corresponding highly reactive, 17-electron neutral compounds. Three secondary reaction paths have been identified, depending on the nature of the reactants and the reaction conditions. (1) With Na + and PPN + salts of [Mn (CO) 5 ] - , thermal substitution of a CO on the metal radical by the C60-results in formation of the anionic, h 2 -fullerene complex [Mn (C 60 ) (CO) 4 ] - . (2) With salts of [Co (CO) 4 ] - , the thermal reaction results in formation of a novel transition-metal fulleride NaCoC 60 while (3) with Na[CpFe (CO) 2 ] and [CpM (CO) 3 ] - (M = Mo, W) , the 17-electron intermediates couple to form the 18-electron dimers, [CpFe (CO) 2 ] 2 and [CpM (CO) 3 ] 2 . In contrast, photochemical reactions of C 60 with salts of [Mn (CO) 5 ] - , [Co (CO) 4 ] - , and [CpM (CO) 3 ] - result in excellent yields of the complexes [Mn (C 60 ) (CO) 4 ] - , [Co (C 60 ) (CO) 3 ] - and [CpM (C 60 ) (CO) 2 ] - , respectively; analogous complexes of C 70 may be made similarly. The new complexes have been characterized crystallographically, by IR, 13 C NMR, and/or Raman spectroscopy and by electrospray mass spectrometry.
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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) | 0.002 | 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 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".