Dichloro[1,4-bis(diphenylphosphino)butane] palladium(II)
Bibliographic record
Abstract
[29964-62-3] C28H28Cl2P2Pd (MW 603.80) InChI = 1S/C28H28P2.2ClH.Pd/c1-5-15-25(16-6-1)29(26-17-7-2-8-18-26)23-13-14-24-30(27-19-9-3-10-20-27)28-21-11-4-12-22-28;;;/h1-12,15-22H,13-14,23-24H2;2*1H;/q;;;+2/p-2 InChIKey = JQXJBXVWVPVTOO-UHFFFAOYSA-L (useful for the catalysis of styrene carbonylation,1 coupling of alkyl Grignard reagents with organic halides,2 selective monoalkylation of organic polyhalides,3 and modification of the dihalovinyl moiety of synthetic pyrethroids4) Solubility: commonly used in ethanol, benzene, and ethereal solvents. Form Supplied in: cream colored powder. Preparative Methods: can be prepared conveniently in situ by mixing the bidentate phosphine ligand and (PhCN)2PdCl2 in either benzene or chloroform.1 The preparation of (dppb)PdCl2 is also possible through the reaction of PdCl2 with dppb in acetone, a process that slowly forms the catalyst as a white precipitate which can be isolated in 51% yield.5 Preparation of the hydrate complex is possible via the reaction of Na2[PdCl4] with dppb in a mixture of CH2Cl2 and water.5 Handling, Storage, and Precautions: hygroscopic.
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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 | 0.004 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.015 | 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; both teacher heads agree on what is shown here.
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".