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 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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.110 | 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 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".