Bibliographic record
Abstract
[133834-87-4] C3H4BrI (MW 246.87) InChI = 1S/C3H4BrI/c4-2-1-3-5/h1,3H,2H2/b3-1- InChIKey = NLKJYDMEZIZSKI-IWQZZHSRSA-N (bifunctional reagent employed in a cyclopentenone annulation method1, 2) Physical Data: colorless liquid, distillation temperature (bulb-to-bulb) 25–45 °C/0.2 mmHg. Solubility: insol H2O; sol pentane, Et2O, THF, CH2Cl2, CHCl3. Preparative Methods: (Z)-3-bromo-1-iodopropene 3 is readily prepared1 by treatment of the corresponding alcohol 2 with Triphenylphosphine Dibromide in CH2Cl2 (eq 1).3 Although a number of useful procedures for the synthesis of 2 have been reported,4 probably the most convenient involves reduction of methyl (Z)-3-iodopropenoate 15 with Diisobutylaluminum Hydride (eq 1).1 (1) Handling, Storage, and Precautions: when stored in a freezer over copper wire under an inert atmosphere, this reagent is stable for months. It decomposes upon exposure to heat and/or light. A slight pink coloration does not affect its reactivity, but the reagent should be distilled from dried basic alumina and copper wire just prior to use. This substance is a lachrymator and should be prepared and handled only in a fume hood.
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 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 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.036 | 0.001 |
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".