Reactions of R<sub>3</sub>PNNPR<sub>3</sub> Species with Boranes: Classical Adducts, FLPs, and Radical Cations
Bibliographic record
Abstract
Abstract Although the nature of bis‐phosphazine species is of much interest, there are few reports of their reactivity. Herein, we show that the bis‐phosphazine species Ph3PNNPPh3 1 react with Lewis acids to give the Lewis acid adducts Ph3PNN(B(C6F5)3)PPh3 3 and Ph3PN(BF3)N(BF3)PPh3 4. Compound 1 also generates a frustrated Lewis pair (FLP) in the presence of BPh3 and thermolysis of 1/BPh3, or 3 at 80 °C released N2 while 4 was stable at 80 °C. In contrast, the species Cy3PNNPCy3 2 reacted with B(C6F5)3 to effect single electron transfer affording a frustrated radical pair (FRP). Independent reactions of 1 and 2 with [Cp2Fe][BF4] gave the corresponding radical salts [R3PNNPR3]•+[BF4] (R = Cy 5b Ph 6). Structural and computational data show the N─N bond is strengthened in the bis‐phosphazine radical cation.
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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) | 0.002 | 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 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".