Facile Synthesis of Cyanide and Isocyanides from CO
Bibliographic record
Abstract
Abstract The reaction of K[N(SiMe3)2] with 13CO proceeds in C6D6 or THF affording K13CN and O(SiMe3)2 under mild conditions as confirmed by crystallographic characterization of K(18‐crown‐6)CN. Similarly reaction of the alkali metal amides, M[N(SiR3)R′] (M=Li, K; R=Ph, Me; R′=alkyl, aryl) provides the corresponding 13C labeled isocyanide RN13C and MOSiR3, generally in high yields. In some instances, the use of the sterically bulky Ph3Si‐substituent is required to preclude 1,2‐silyl migration affording the silylcarbamoyl salt M[Me3SiC(O)NR′]. These reactions have been used to obtain 19 examples of 13C labelled isocyanides, and several examples of gram scale reactions are reported. The mechanism of the reactions is probed via reliable DFT calculations.
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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) | 0.003 | 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".