Thermal Rearrangement via P–C Bond Cleavage of a Tridentate Diphosphine–N-Heterocyclic Carbene Ligand System Coordinated to Rhodium
Bibliographic record
Abstract
The synthesis of a series of rhodium complexes, [PCP]RhX, where X = Cl, H, CH 3 and PCP is a tridentate ligand that contains a central, saturated NHC donor flanked by two o -phenylenediisopropylphosphino groups, is described. These complexes were characterized by NMR spectroscopy ( 1 H, 13 C, and 31 P) and, in the case of the X = Cl derivative, by X-ray crystallography. Investigation of the thermal reactivity of these complexes uncovered an unexpected ligand rearrangement process (for X = H, CH 3 ) resulting from intramolecular P–C bond cleavage between one of the phosphine donors and the aryl linker of the ligand backbone. The structures of the P–C activation products are confirmed through X-ray diffraction analysis, and preliminary rate data in the case of the rhodium hydride are presented.
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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 | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| 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 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".