Hemilabile Pincer-Type Hydride Complexes of Iridium
Bibliographic record
Abstract
The ligand t Bu 2 PC 2 H 4 NHC 2 H 4 NEt 2 (PNHN) was synthesized starting from 2-(diethylamino)ethyl chloride hydrochloride and ethanolamine. Reaction of PNHN with [IrCl(COE) 2 ] 2 under H 2 afforded the dihydride cis -IrH 2 Cl(κ 3 -PNHN) ( 1 ) in excellent yield. Treatment of 1 with t BuOK led to clean formation of the 16-electron amido complex IrH 2 (κ 3 -PNN) ( 2 ). Hydrogenation of 2 in toluene or ethyl acetate produced the trihydride mer -IrH 3 (κ 3 -PNHN) ( 3 ). This complex was unstable and dimerized to give [IrH 2 (κ 2 -PNHN)] 2 (μ-H) 2 ( 4 ) with uncoordinated NEt 2 groups. The structures of 1 and 4 were established by X-ray crystallography. Complex 2 demonstrated good catalytic activity for transfer hydrogenation of acetophenone, cyclohexanone, and butanone.
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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) | 0.007 | 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".