3-(2,4,6-Trimethylphenyl)-1-methyl-1<i>H</i>-benzo[<i>d</i>]imidazol-3-ium Iodide
Bibliographic record
Abstract
[937807-73-3] C17H19IN2 (MW 378.25) InChI = 1S/C17H19N2.HI/c1-12-9-13(2)17(14(3)10-12)19-11-18(4)15-7-5-6-8-16(15)19;/h5-11H,1-4H3;1H/q+1;/p-1 InChIKey = GZUMUMKCXFZBLQ-UHFFFAOYSA-M (N-heterocyclic carbene, umpolung, homoenolate, organocatalysis) Physical Data: mp 266–269 °C. Solubility: sol DCM, chloroform; insol ether, alkanes. Form Supplied in: colorless to off-white solid. Analysis of Reagent Purity: IR (film) 3018.1, 2947.8, 1610.2, 1560.3, 1260.7, 753.8, 731.9 cm−1; 1H NMR (400 MHz, CDCl3) δ 10.75 (s, 1H), 7.90 (d, J = 8.2 Hz, 1H), 7.72 (t, J = 7.6 Hz, 1H); 7.62 (t, J = 7.6,1H), 7.23 (t, J = 8.2 Hz, 1H), 7.06 (s, 2H), 4.54 (s, 3H), 2.37 (s, 3H), 2.02 (s, 6H). Preparative Methods: the original synthesis is a five-step procedure utilizing two consecutive Buchwald–Hartwig amination coupling reactions (eq 1).1 (1) An alternate synthesis was reported, which is shorter and relies upon a copper-catalyzed amination reaction (eq 2).2 (2)
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.023 | 0.019 |
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".