Interaction of Neutral Donors with Methylaluminoxane
Bibliographic record
Abstract
Methylaluminoxane (MAO) is a key activator for olefin polymerization catalysts, making its chemistry of ongoing interest. Strong and bidentate neutral donors such as 2,2′‐bipyridine are effective abstractors of the dimethylaluminum cation, [Me 2 Al] + , from methylaluminoxane (MAO), while monodentate, weaker donors such as THF appear most prone to adduct formation with both free and bound trimethylaluminum. The ionization process can be readily investigated using electrospray ionization mass spectrometry (ESI‐MS) in fluorobenzene (PhF) solution. Complementary studies employing 1D and 2D 1 H NMR spectroscopic studies in [D 5 ]bromobenzene solution provide details on the extent of ionization vs. donor‐acceptor complex formation for the different donors studied. DFT studies employing different neutral model precursors and mono‐ vs. didentate donors shed light on possible mechanisms for ion‐pair formation.
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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) | 0.032 | 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".