Cyclometalated Tridentate C-N-N Ligands with an Amine or Amido Donor in Platinum(II) and Palladium(II) Complexes and a Novel Potassium Alkoxide Aggregate
Bibliographic record
Abstract
The new ligand 2-phenyl-6-(2-aminoisopropyl)pyridine, papH 2, was synthesized and characterized. The corresponding Pt(II) and Pd(II) complexes Pt(papH)Cl ( 2 ) and Pd(papH)Cl ( 3 ) were synthesized and fully characterized by NMR spectroscopy and single-crystal X-ray diffraction. In each complex the κ 3 N, N, C tridentate papH ligand forms two five-membered rings with the metal, one of which is created by cyclometalation of the ortho carbon of the phenyl group. Compound 2 was found to react with KO t Bu to afford a Pt(II) amido complex that was isolated as [Pt(pap)] 2 (KCl)(KO t Bu) 8 ( 4 ). As revealed by single-crystal X-ray diffraction, compound 4 has a novel structure, in which two Pt(pap) moieties are attached to the K 9 O 8 Cl “core” of the potassium alkoxide aggregate. A solution of compound 4 does not react with H 2 (g), even at 3 atm and 60 °C. A hydride complex that is suspected to be Pt(papH)H was observed by reacting 2 with K[BH( s Bu) 3 ]. This hydride does not react with acetophenone. These properties are in contrast with those of ruthenium hydrido amine/amido catalysts that readily hydrogenate acetophenone. The reaction of compound 3 with KO t Bu yielded a complicated, unidentified mixture that can be reduced to Pd(0) by 3 atm of dihydrogen at ambient temperature.
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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 | 0.001 | 0.002 |
| 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) | 0.000 | 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".