Oxidatively Induced Reductive Elimination from a Chromium(III) Bis(aryl) Complex
Bibliographic record
Abstract
The previously reported high-spin Cr(II) compounds CpCr(C 6 H 4 CH 2 NMe 2 ) ( 1 ) and CpCr[C(Ph)C(Ph)C 6 H 4 CH 2 NMe 2 ] ( 2 ) were investigated as precursors to CpCr(III) complexes. Single-electron oxidation of 1 was used to prepare CpCr(C 6 H 4 CH 2 NMe 2 )(X) for X = I ( 3 ), OTs ( 4 ), O 2 CPh ( 5 ), OCMe 2 Ph ( 6 ), SPh ( 7 ). Similarly, CpCr[C(Ph)C(Ph)C 6 H 4 CH 2 NMe 2 ](X) for X = I ( 8 ), SPh ( 9 ) were obtained from 2 . Reactions of 4 with PhCH 2 MgCl or Mg(C 6 H 4 Me) 2 reagents gave the Cr(III) benzyl ( 10 ) and p -tolyl ( 11 ) complexes, respectively. The corresponding reaction of 4 with Mg(CH 2 CMe 3 ) 2 led to isolation of 12, a bimetallic complex with a bridging neopentylidene group. While the reaction of 7 or 10 with AgOTs gave Cr(III) tosylate complex 4, the reaction of 11 and AgOTs led to the product of reductive elimination. The structures of 1, 2, 6 – 8, 11, and 12 were elucidated using single-crystal X-ray diffraction.
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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) | 0.001 | 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".