Preparation and Characterization of Nickel Complexes with η-Indenyl Ligands Bearing a Pendant Aminoalkyl Chain
Bibliographic record
Abstract
The aminoindenyl complexes {Ind(CH 2 ) 3,4 N( t -Bu)H}Ni(PPh 3 )Cl ( 7, 8 ) and {Ind(CH 2 ) 2,3 NMe 2 }Ni(PPh 3 )Cl ( 9, 10 ) have been prepared and characterized by spectroscopy and, in the case of 7 and 9, by X-ray structural studies. Although there is no interaction between the Ni center and the amine moiety of these complexes in the solid state, solution spectra point to a temperature-dependent, intramolecular N→Ni coordination in complex 9 and a more facile, intermolecular interaction in 10 . Abstraction of Cl - from these complexes led to the formation of the cations [{η 3:η 0 -Ind(CH 2 ) 3,4 N( t -Bu)H}Ni(PPh 3 ) 2 ] + and [{η 3:η 1 -Ind(CH 2 ) 2,3 NMe 2 }Ni(PPh 3 )] + ( 11, 12 ). The origin of the observed differences in the reactivities of these complexes is discussed in terms of the lengths of the tether and the nature of the N-substituents.
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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) | 0.017 | 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".