Α β-Diketiminato−Nickel(II) Synthon for Nickel(I) Complexes
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Bibliographic record
Abstract
The compound (Nacnac)Ni(μ-Br) 2 Li(THF) 2 (Nacnac = (HC(CMeNC 6 H 3 ( i -Pr) 2 ) 2 ) was reduced by reaction with K/Na alloy in toluene. The resulting product [((Nacnac)Ni) 2 (μ-η 3:η 3 -C 6 H 5 Me)] ( 1) was characterized and is best described as a Ni(II) species in which electron transfer from Ni to toluene has occurred. This compound reacts with a variety of donors to give Ni(I) complexes. For example, compound 1 reacts with phosphines, nitriles, acetylenes, olefins, and ketones to give the paramagnetic complexes (Nacnac)Ni(PCy 3 ) ( 2 ), (Nacnac)Ni(Ph 2 PCH 2 PPh 2 ) ( 3 ), (Nacnac)Ni(NCPh) ( 4), (Nacnac)Ni( η 2 -PhCCPh) ( 5 ), (Nacnac)Ni( η 2 -Me 3 SiCCSiMe 3 )( 6 ), (Nacnac)Ni( η 2 -H 2 CCPh 2 ) ( 7 ), and (Nacnac)Ni(OCPh 2 ) ( 8 ). In the related reaction of 1 with dimethylfulvene, electron transfer from metal to ligand is evidenced by the formation of the dimetallic species [((Nacnac)Ni( η 3: η 3 -C 5 H 4 CMe 2 )) 2 ] ( 9 ). The crystal structures of 1 − 9 are reported, and the bonding and reactivity of these products are discussed.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.080 | 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 it