Synthesis of Well-Defined <i>N</i>-Heterocyclic Carbene Silver(I) Complexes
Bibliographic record
Abstract
A series of N -heterocyclic carbene (NHC)AgCl complexes [NHC = SIMes ( 1 ), IPr ( 2 ), SIPr ( 3 ), IPrMe ( 4 ), IMe ( 5 ), ICy ( 6 ), IAd ( 7 ), IsB ( 8 ), IDD ( 9 ), and TPh ( 10 )] have been synthesized through reaction of the imidazolium chloride salts with Ag 2 O or by direct metalation of the corresponding imidazol-2-ylidene carbene in the presence of AgCl. All silver(I) complexes [(SIMes)AgCl] ( 11 ), [(IPr)AgCl] ( 12 ), [(SIPr)AgCl] ( 13 ), [(IPrMe)AgCl] ( 14 ), [(IMe)AgCl] ( 15 ), [(ICy)AgCl] ( 16 ), [(IAd)AgCl] ( 17 ), [(IsB)AgCl] ( 18 ), [(IDD)AgCl] ( 19 ), and [(TPh)AgCl] ( 20 ) have been spectroscopically and structurally characterized. The structure of these silver complexes is dependent on the halide and the solvent used for the synthesis. Adjusting these parameters has led to the previously reported complex, [(IMes) 2 Ag] + [AgCl 2 ] - ( 21 ), and to a new silver complex, [(IMes) 2 Ag] + 2 [Ag 4 I 6 ] 2 - ( 22 ).
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".