Synthesis and Characterization of Primary Aluminum Parent Amides and Phosphides
Bibliographic record
Abstract
The synthesis and characterization of the sterically crowded primary alanes (Ar i Pr 4 AlH 2 ) 2 (Ar i Pr 4 = C 6 H 3 -2,6(C 6 H 3 -2,6- i Pr 2 ) 2 ) and (Ar i Pr 8 AlH 2 ) 2 (Ar i Pr 8 = C 6 H-2,6(C 6 H 2 -2,4,6- i Pr 6 ) 2 -3,5- i Pr 2 ) are described. They, along with their previously reported less-hindered analogue (Ar Me 6 AlH 2 ) 2 (Ar Me 6 = C 6 H 3 -2,6(C 6 H 2 -2,4,6-Me 3 ) 2 ), were reacted with ammonia to give the parent amido alanes {Ar x Al(H)NH 2 } 2 (Ar x = Ar Me 6, 1; Ar i Pr 4, 2; Ar i Pr 8, 3 ), which are the first well-characterized hydride amido derivatives of aluminum and are relatively rare examples of parent aluminum amides. In contrast, the reaction of (Ar Me 6 AlH 2 ) 2 with phosphine yielded the structurally unique Al/P cage species {(Ar Me 6 Al) 3 (μ-PH 2 ) 3 (μ-PH)PH 2 } ( 4 ) as the major product and a smaller amount of {(Ar Me 6 Al) 4 (μ-PH 2 ) 4 (μ-PH)} ( 5 ) as a minor product. All compounds were characterized by NMR and IR spectroscopy, while compounds 2 – 5 were also characterized by X-ray crystallography.
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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) | 0.003 | 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".