A Reactivity Study of Well-Defined Alkenylalanes Toward Anions, Lewis-Bases and Benzophenone
Bibliographic record
Abstract
The reactivity of well-defined silyl-substituted alkenylalanes has been studied in the presence of anions, Lewis bases and benzophenone. In the presence of methyllithium or fluoride anions, the corresponding methyl- or fluoro-aluminates bearing alkenyl substituents of Z configuration have been fully characterized including by X-ray diffraction analysis. The configurational stability of these ate complexes toward Z -to- E isomerization revealed substituent-dependent and was examined on the basis of experiments and DFT calculations. In a second step, the fate of benzonitrile and ketone adducts of the alkenylalanes was investigated. Whereas the benzonitrile adducts revealed thermally stable, the corresponding Ph 2 C═O → Al(alkenyl) 3 adducts evolved to the alkoxyaluminums due to the transfer of a α-hydride from an alkenyl substituent to the activated carbonyl function. The mechanism of this uncommon reduction could be unveiled and compared to more classical alkyl- and alkenyl-groups migration processes.
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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) | 0.001 | 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".