Zirconium Complexes of Symmetric and of Chiral Diketiminate Ligands: Synthesis, Crystal Structures, and Reactivities
Bibliographic record
Abstract
Reaction of N, N -dialkyl-2-amino-4-iminopent-2-enes ( nacnac R H; R = Bn ( 1a ), Cy ( 1b ), R -CH(Me)Ph ( 1c )) with n BuLi afforded the lithium salts nacnac R Li(THF), 2a − c . Further reaction with ZrCl 4 or ZrCl 4 (THF) 2 yielded the cis -dichloride complexes nacnac R 2 ZrCl 2, 3a − c . As a side reaction in the synthesis of 3c, CH activation of CH(Me)Ph under formal HCl elimination was observed. Complex 3a could also be obtained by reaction of nacnac Bn H with n Bu 2 ZrCl 2 . nacnac Bn 2 ZrMe 2, 5, was formed in reactions of 3a with MeLi in the presence of excess AlMe 3 and was isolated from the reaction of Me 2 ZrCl 2 with 2a . Complex 5 reacts with aluminum chloride compounds, but not with lithium chloride, to form the dichloride complex 3a and with ethanol to form nacnac Bn 2 Zr(OEt) 2, 6 . X-ray diffraction studies have been performed for 3a − c, 5, and 6 .
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.004 | 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".