Chiral <i>cis</i>-Platinum Acetylide Complexes via Diphosphine Ligand Exchange: Effect of the Ligand
Bibliographic record
Abstract
Chiral, bidentate phosphine ligands ( R,R -CHIRAPHOS, R- PROPHOS, S,S- BDPP, R,R- Me-DUPHOS, R,R- NORPHOS) react with trans -platinum acetylide complexes 1a and 1b, (Ph 3 P) 2 Pt(C≡CR) 2 (R = TIPS, p -MeC 6 H 4 ), via ligand exchange to generate chiral platinum acetylide complexes. The corresponding cis -platinum complexes are formed in all cases except for the reaction of 1b with S,S- BDPP, where the dimeric complex 4d′ is the product. Conversely, the reaction of 1a and 1b with the ligands S, S -DIOP, R -BINAP, and R -SYNPHOS fails to give the desired product in appreciable yield. Circular dichroism spectroscopy is used to examine the effect of the chiral ligand on the chiroptical properties of the platinum acetylide framework. X-ray crystallographic analyses of achiral complex 1a and chiral derivative 4e are reported.
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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 | 0.000 | 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) | 0.000 | 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".