Syntheses and applications of group VI and VIII-X heterocyclic-phosphinimine complexes.
Bibliographic record
Abstract
A class of phosphinimine-based group VI and VIII-X late transition metal (LTM) complexes has been synthesized and evaluated for olefin polymerisation activity. The phosphinimine ligand has been designed to incorporate an imine moiety; a functional group which has been successfully applied in very active LTM olefin catalytic systems. Heterocycles, such as pyridine and imidazole are used to accomplish the integration of an imine group into the ligand. Phosphines employing the heterocyclic group are oxidized by phenyl azides in excellent yields to form phosphinimine ligands. These phosphinimine ligands react with several LTM's, the complexes of which are identified by single crystal diffraction studies, elemental analysis, NMR and IR spectroscopy, and magnetic susceptibility measurements. In contrast to highly active imine-based systems, we find iron(II) and nickel(II) complexes with bulky phosphinimine-based ligands oligomerise ethylene to form C4 alkenes with moderate activities. (Abstract shortened by UMI.)Dept. of Chemistry and Biochemistry. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2002 .S67. Source: Masters Abstracts International, Volume: 43-01, page: 0217. Adviser: Douglas W. Stephan. Thesis (M.Sc.)--University of Windsor (Canada), 2003.
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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) | 0.001 | 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 | 0.000 |
| 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".