Pt<sup>II</sup> and Pd<sup>II</sup> Complexes with a <i>trans</i>‐Chelating Bis(pyridyl) Ligand
Bibliographic record
Abstract
Abstract An atropisomeric bis(pyridyl) chelate ligand bis{3,3′‐[N‐Ph‐2‐(2′‐py) indolyl]} (bpib) has been found to readily form trans‐chelating PdII and PtII complexes. Two such complexes, Pt(bpib)Cl2 and Pd(bpib)Cl2 have been isolated and their structures were determined by single‐crystal X‐ray diffraction analysis. Both Pt(bpib)Cl2 and Pd(bpib)Cl2 have a chiral structure with C2 symmetry. Pt(bpib)Cl2 displays a long‐lived phosphorescence with λem = 595 nm in a frozen CH2Cl2 solution at 77 K. To examine the potential use of the trans chelate bpib ligand in oxidative coupling reactions catalysed by PdII compounds, acetoxylation of benzene, chlorobenzene and toluene by PhI(OAc)2 using Pd(OAc)2/bpib (2:1) as the catalyst was examined and compared with the cis‐chelating system Pd(OAc)2/2,2′‐bipyridine (bipy). The bpib system was found to accelerate the reaction but lower the overall yield.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".