1,2,4,6-THIATRIAZINYLS: STABLE FREE RADICALS WITH WELL-DEFINED EPR SPECTRA
Bibliographic record
Abstract
Abstract The EPR spectra of six 1,2,4,6-thiatriazinyls have been redetermined and simulated using modern computer simulation programs. The hyperfine coupling (hfc) constants determined from the simulations differ in some cases significantly from those reported previously. The presence of unresolved coupling also can be detected in some of the spectra. The hfc values to the two kinds of nitrogen atoms in the ring vary in a systematic fashion with the relative electron-withdrawing character of the substituents attached to the ring carbon atoms at the 3 and 5 positions. Keywords: EPR spectrahyperfine coupling constantssimulationthiatriazinethiatriazinylthiazyl This work was supported by the Natural Sciences and Engineering Research Council of Canada and the University of Lethbridge Research Fund (R.T.B.). The EPR spectrometer was purchased with an NSERC Equipment Grant awarded to the University of Calgary. We thank that institution for generous access to the instrument. The University of Lethbridge Travel Fund assisted with travel expenses related to the delivery of the oral version of this paper. Notes a Hyperfine coupling constants and linewidths expressed in units of milliTesla (mT). b Expressed as the % Lorentzian character; balance is Gaussian. Lorentzian lineshape is expected where relaxation effects dominate, whereas Gaussian lineshape is associated with unresolved hfc.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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".