Nucleophilic Degradation of a β-Diketiminato Ancillary by a Transient Scandium Hydride Intermediate
Bibliographic record
Abstract
Reactions of a β-diketiminato-supported scandium dichloride LScCl 2 (L = (Ar)NC( t Bu)CHC( t Bu)N(Ar); Ar = 2,6- i Pr 2 -C 6 H 3 ) with boro- and aluminohydride reagents result in transient scandium hydrides, which undergo hydride transfer to the ligand backbone, inducing fragmentation of the ancillary. The products of this fragmentation have been characterized and include an organic enamine ( 2 ) and scandium imido containing clusters. One such product, formed via reaction with LiBEt 3 H and LScCl 2, is the trimer [ArNScCl(THF)] 3 [LiH(THF)], 1, which includes an occluded molecule of lithium hydride. The reactions involving LiAlH 4, along with labeling studies, helped to clarify the fragmentation pathway and account for the observed products.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.014 | 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".