Rational Design of Tetranuclear Complexes Employing <i>N</i>‐Imidoylamidine Based Ligands
Bibliographic record
Abstract
Ligands such as N ‐2‐pyrimidylimidoyl‐2‐pyrimidylamidine ( Pm 2 ImAm ) possess both a bidentate and tridentate coordination site within a single ligand framework. Taking advantage of this, two tetranuclear complexes with manganese ( [Mn III Mn II 3 (Pm 2 ImAm) 3 Cl 6 ] ) and iron ( [Fe III 4 (Pm 2 ImAm) 3 Cl 9 ] ) have been isolated, characterized by single‐crystal X‐ray analysis, and their magnetic properties have been investigated through SQUID magnetometry and Mössbauer spectroscopy. As well, a mononuclear ( [Fe III (Pm 2 ImAm)Cl 3 ] ) and binuclear ( [Mn II 2 ( µ ‐Cl) 2 (Pm 2 ImAm) 2 Cl 2 ] ) complex employing this ligand framework were also isolated, characterized by single‐crystal X‐ray analysis and their magnetic properties were investigated. For comparison purposes, the previously reported mononuclear complexes [Mn III (Py 2 ImAm) 3 ] and [Fe III (Py 2 ImAm) 3 ] were also probed here via SQUID magnetometry due to the similarities between these mononuclear systems and fragments of the tetranuclear complexes. Through this approach, clear interpretation of the magnetic properties in [Mn III Mn II 3 (Pm 2 ImAm) 3 Cl 6 ] and [Fe III 4 (Pm 2 ImAm) 3 Cl 9 ] was achieved. These results reveal that employing our N ‐imidoylamidine ligands facilitates the rational design of polynuclear complexes with differing metal ion spin states.
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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 | 0.001 | 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.011 | 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".