β-Diketiminato Scandium Chemistry: Attempted Deprotonation of Cationic Amido Complexes
Bibliographic record
Abstract
Treatment of the β-diketiminato-supported scandium amido methyl derivatives [ArNC( t Bu)CHC( t Bu)NAr]Sc(Me)(NHR) (Ar = 2,6- i Pr 2 -C 6 H 3; R = t Bu, 2,6- i Pr 2 -C 6 H 3 ) with 1 equiv of tris(pentafluorophenyl)borane resulted in the formation of scandium amido ion pairs, 1a and 1b, respectively, in good yields. A single-crystal X-ray analysis of 1a was undertaken, and two crystallographically independent molecules were observed in which one contains an N−H···F−C hydrogen bond while the other does not. Several attempts to deprotonate the amido ligand to yield a neutral imido species resulted in either attack of the base at the metal center or deprotonation of the β-diketiminato ligand. For example, treatment of 1a with tert -butyllithium gave [ArNC( t Bu)CHC( t Bu)NAr]Sc(CMe 3 )(NH t Bu) ( 2 ), while treatment with the phosphazene base [(Me 2 N) 3 P N] 3 P N t Bu gave the previously characterized metalated complex 3 .
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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 | 0.001 |
| 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) | 0.054 | 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".