Auto-catalytic chemistry for the solvent-free synthesis of isobutylene-rich ionomers
Bibliographic record
Abstract
Ionomer derivatives of brominated poly(isobutylene-co-isoprene) rubber (BIIR) are prepared by alkylation of PPh3,imidazole and 2-[2-(dimethylamino)ethoxy]ethanol under solvent-free conditions. Halide displacement is shown to be accompanied by allylic bromide rearrangement to kinetically more reactive endo-allylic bromide isomers. Alkylation to give quaternary onium-halide salts produces an isomerisation catalyst in situ, owing to a rapid SN2′ isomerisation by free bromide. As a result, a continuous process for PPh3 alkylation can be catalyzed by the recycling of a small amount of IIR-PPh3Br product to the feed, thereby supporting an irreversible ionomer synthesis that proceeds to full conversion without the generation of reaction byproducts.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.012 | 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".