Bibliographic record
Abstract
[23743-26-2] C26H48P2 (MW 422.62) 1S/C26H48P2/c1-5-13-23(14-6-1)27(24-15-7-2-8-16-24)21-22-28(25-17-9-3-10-18-25)26-19-11-4-12-20-26/h23-26H,1-22H2 BOUYBUIVMHNXQB-UHFFFAOYSA-N (ligand for metal-catalyzed reactions) Alternate Names: 1,2-ethanediylbis[dicyclohexyl]phosphine, ethylenebis(dicyclohexylphosphine), dcpe, dCype. Physical Data: mp 96–97 °C. Form Supplied in: white to off-white crystal or powder. Purification: sublimation at 135 °C/0.06 mm.1 Preparative Method: the title compound is prepared by addition of ethylene glycol over chlorodicyclohexylphosphane. The resulting intermediate was heated to give the corresponding bis phosphine oxide, which is reduced by trichlorosilane. Handling, Storage, and Precautions: may be harmful if inhaled. Causes respiratory tract irritation. May be harmful if absorbed through skin. Causes skin and eye irritation. May be harmful if swallowed. The toxicity of this reagent is not known; therefore, it should be manipulated in a well-ventilated fume hood. Protective gloves, clothing, and eye/face protection should be worn while manipulating this reagent. Keep container tightly closed in a dry and well-ventilated place. Moisture sensitive. Handle and store under inert gas preferentially.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.026 | 0.013 |
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".