Tetracarbonyl(trifluoromethyl)cobalt(I) [Co(CO)<sub>4</sub>(CF<sub>3</sub>)] as a Precursor to New Cobalt Trifluoromethyl and Difluorocarbene Complexes
Bibliographic record
Abstract
An improved synthesis of the known trifluoromethyl cobalt compound Co(CO) 4 (CF 3 ) ( 1 ), which gives significantly higher yields than previously reported methods, allows for an investigation of its carbonyl substitution chemistry. Treatment of 1 with P-donor ligands of varying denticity under thermal conditions afforded Co[P(O- o -tolyl) 3 ](CO) 3 (CF 3 ) ( 2 ), Co(DPPE)(CO) 2 (CF 3 ) ( 3 ), and Co(P 3 )(CO)(CF 3 ) ( 4 ) in high isolated yields [DPPE = Ph 2 PCH 2 CH 2 PPh 2; P 3 = PhP(CH 2 CH 2 PPh 2 ) 2 ]. The new cobalt N-heterocyclic carbene complex Co(SIPr)(CO) 3 (CF 3 ) ( 5 ) [SIPr = 1,3-bis(2,6-diisopropylphenyl)imidazolidin-2-ylidene)] was obtained by phosphine substitution from Co(PPh 3 )(CO) 3 (CF 3 ), a known compound efficiently prepared from 1 . Additionally, we report the synthesis of two rare cobalt difluorocarbene complexes ([Co] = CF 2 ) produced by fluoride abstraction from 3 or 4 . These results are relevant to our efforts to assess the reactivity of first-row metal perfluoroalkyl and fluorocarbene complexes.
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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".