Triple‐decker tin and lead cations
Bibliographic record
Abstract
Abstract The triple‐decker cation salts [(η 5 ‐C 5 Me 5 )M(µ‐η 5 ‐C 5 Me 5 )M(η 5 ‐C 5 Me 5 )][B(C 6 F 5 ) 4 ] (M = Sn, Pb) have been prepared by treatment of [(η 5 ‐C 5 Me 5 )M][B(C 6 F 5 ) 4 ] with the corresponding metallocenes, [M(η 5 ‐C 5 Me 5 ) 2 ] (M = Sn, Pb). Investigation of the structures of these triple‐decker systems by X‐ray crystallography revealed an overall cis‐type cationic geometry. In solution, NMR studies indicate that the triple‐decker cations undergo rapid, reversible dissociation. The reaction of [In(η 5 ‐C 5 Me 5 )] with an equimolar quantity of H 2 O·B(C 6 F 5 ) 3 and B(C 6 F 5 ) 3 ] afforded [(η 6 ‐toluene)In(µ‐η 5 ‐C 5 Me 5 )In(η 6 ‐toluene)][(C 6 F 5 ) 3 B(OH)B(C 6 F 5 ) 3 ]. Density functional theory calculations on a model system indicate that the capping toluene molecules in this di‐indium cation are weakly bonded. Use of the smaller counter‐ion [B(C 6 F 5 ) 4 ] − results in isolation of the inverse sandwich cation [In(µ‐η 5 ‐C 5 Me 5 )In] + . Copyright © 2005 John Wiley & Sons, Ltd.
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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) | 0.001 | 0.001 |
| 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.029 | 0.001 |
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".