Structures and CO<sub>2</sub> Reactivity of Zinc Complexes of Bis(diisopropyl-) and Bis(diphenylphosphino)amines
Bibliographic record
Abstract
The bis(phosphino)amines (R 2 P)NH(PR′ 2 ) (R = R′ = isopropyl; R = R′ = phenyl; R = isopropyl, R′ = phenyl) react with ZnEt 2 to form complexes with two different structural motifs, either the homoleptic monomeric P,P-chelates Zn[N( i -Pr 2 P) 2 ] 2 and Zn[N( i -Pr 2 P)(Ph 2 P)] 2 or the heteroleptic dimeric Zn 2 N 2 P 2 heterocycles {EtZn[N(PPh 2 ) 2 ]} 2 and {EtZn[N(PPh 2 )( i -Pr 2 P)]} 2 . In two cases, CO 2 reacts with these complexes to give adducts Zn[O 2 CP( i -Pr 2 )NP( i -Pr 2 )] 2 and Zn[O 2 CP( i -Pr 2 )NPPh 2 ][Ph 2 PN( i -Pr 2 P)]ZnEt 2, similar to adducts formed from the reaction of CO 2 with frustrated Lewis pairs (FLPs). In the other two cases, reaction with CO 2 results in cleavage and rearrangement of the N–P bonds to give either N(PPh 2 ) 3 or Ph 2 P( i Pr 2 P)NPPh 2 . The zinc complexes and their CO 2 products were characterized with a combination of single crystal X-ray diffraction and multinuclear NMR spectroscopy.
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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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".