Bibliographic record
Abstract
[107-13-1] C3H3N (MW 53.06) InChI = 1S/C3H3N/c1-2-3-4/h2H,1H2 InChIKey = NLHHRLWOUZZQLW-UHFFFAOYSA-N (electrophile in 1,4-addition reactions; radical acceptor; dienophile; acceptor in cycloaddition reactions) Physical Data: mp −83 °C; bp 77 °C; d 0.806 g cm−3; nD 1.3911. Solubility: miscible with most organic solvents; 7.3 g of acrylonitrile dissolves in 100 g of water at 20 °C. Form Supplied in: colorless liquid (inhibited with 35–45 ppm hydroquinone monomethyl ether); widely available. Purification: the stabilizer can be removed prior to use by passing the liquid through a column of activated alumina or by washing with a 1% aqueous solution of NaOH (if traces of water are allowed in the final product) followed by distillation. For dry acrylonitrile, the following procedure is recommended. Wash with dilute H2SO4 or H3PO4, then with dilute aqueous Na2CO3 and water. Dry over Na2SO4, CaCl2, or by shaking with molecular sieves. Finally, fractional distillation under nitrogen (boiling fraction of 75–75.5 °C) provides acrylonitrile which can be stabilized by adding 10 ppm tert-butyl catechol or hydroquinone monomethyl ether. Pure acrylonitrile is distilled as required.1a Handling, Storage, and Precautions: explosive, flammable, and toxic liquid. May polymerize spontaneously, particularly in the absence of oxygen or on exposure to visible light, if no inhibitor is present. Polymerizes violently in the presence of concentrated alkali. Highly toxic through cyanide effect. Use 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 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) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.107 | 0.072 |
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".