Electron‐Triggered Imine Coupling: Synthesis and Characterization of Three Redox States (0,–1,–2) of a Ni(N<sub>2</sub>S<sub>2</sub>) Complex
Bibliographic record
Abstract
Abstract Metal imine‐thiolate complexes, M(NS)2 are known to undergo imine C−C bond formation to give M(N2S2) complexes (M=Co, Ni) containing a redox‐active ligand. Although these transfor‐mations are not typically quantitative, we demonstrate here that the one‐electron reduction of a related Ni bis(imine‐thiolate) complex affords the corresponding paramagnetic [Ni(N2S2)]‐ anion (2⋅−) exclusively; subsequent oxidation with [Cp2Fe]BF4 then affords a high yield of neutral 2 (Cp=η5‐cyclopentadienyl). Moreover, electrochemical studies indicate that a second one‐electron reduction affords the diamagnetic dianion. Both anionic products were isolated and characterized by SC‐XRD and their electronic structures were investigated by UV‐vis spectro‐electrochemistry, EPR and NMR spectroscopy, and DFT studies. These studies show that reduction proceeds primarily on the ligand, with (N2S2)4− containing both thiolate and ring‐delocalized anions.
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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) | 0.000 | 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) | 0.001 | 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 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".