Synthesis and structure of <i>N</i> -(perfluorophenyl)isonicotinamide
Bibliographic record
Abstract
The title compound [systematic name: N -(2,3,4,5,6-pentafluorophenyl)pyridine-4-carboxamide], C 12 H 5 F 5 N 2 O, crystallizes with two independent molecules ( A and B ) in the asymmetric unit in space group P 1 . The molecules adopt a conformation where the planes of the pentafluorophenyl and pyridyl rings have twist angles of 5.3 (1) and 14.5 (1)°. In the crystal, the molecules are connected by N—H...N hydrogen bonds between the amide H atom and the pyridyl nitrogen atom of an adjacent molecule to generate [ 1 10] chains of alternating A and B molecules. The packing is consolidated by C—H...π interactions, π–π stacking and C—H...O interactions and a short F...F contact of 2.7270 (13) Å occurs. The structures of related isonicotinamides are surveyed.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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".