Complexation of Co(DBF<sub>2</sub>)<sub>2</sub> by <i>N</i>-Methylimidazole in Acetonitrile: Formation Constants and <sup>1</sup>H NMR Shifts and Relaxation Times
Bibliographic record
Abstract
The complexation of Co(DBF2)2 by N-methylimidazole (MeIm) in acetonitrile has been studied by spectrophotometric titration at 0, 19, and 35 °C. The equilibrium constants K1 and K2 and their thermodynamic parameters have been determined. NMR studies of the chemical shifts and relaxation rates of the C−H protons of MeIm from −35 °C to 35 °C indicate that MeIm ligand exchange is in the fast-exchange limit. The relevance of these measurements to previous studies on related vitamin B12 models is discussed.
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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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".