Synthesis and Characterization of New Nitrogen-Donor-Stabilized <i>N</i>-Silylphosphoranimine Cations
Bibliographic record
Abstract
The phosphoranimine Br(CF3CH2O)2P=NSiMe3 (12) reacts quantitatively with nitrogen bases pyridine, 4,4'-bipyridine, and quinuclidine (quin) to form the N-donor stabilized phosphoranimine cations [N-donor.P(OCH2CF3)2=NSiMe3] ([15]+) in the presence of the halide abstractor AgOTf. In contrast to quinuclidine, in the absence of a halide abstractor, the weak bases pyridine and 4,4'-bipyridine do not undergo reactions with 12 or with the phosphoranimine Cl3P=NSiMe3 (7). Furthermore, unlike the weaker bases, quinuclidine also reacts with 7 to form the expected quinuclidine-stabilized phosphoranimine cation [quin.PCl2=NSiMe3]+ ([16]+) in the presence of AgOTf. However, in the absence of AgOTf, quinuclidine reacts with 7 to presumably yield the salt [16]Cl, which then undergoes a further quinuclidine ring-opening reaction to yield the cationic piperidyl-substituted phosphoranimine [(quin)CH2CH2C5H9N-PCl2=NSiMe3]Cl ([19]Cl). Reactions involving 7 and 12 with other halide abstraction reagents, such as GaCl3, are also described.
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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 | 0.001 |
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".