Synthesis of extended polyynes: Toward carbyne
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
This account will focus on the synthesis and characterization of polyynes. After a brief discussion of synthetic tools commonly employed in the assembly of sp-hybridized carbon frameworks, a more detailed discussion of polyynes composed of at least five contiguous acetylenic units will follow. The construction of polyynes up to hexaynes is a rather well-developed area where traditional synthetic strategies are typically still useful, i.e., metal-catalyzed homo- or heterocoupling and exhaustive elimination reactions. The synthesis of longer polyynes (heptaynes, octaynes, etc.), on the other hand, can require more subtle synthetic approaches due to inherent problems of reagent compatibility and the reactive nature of many polyyne intermediates and products. A description of the innovative synthetic methods that have been used over the past decade to overcome some of these challenges will be presented. Furthermore, a review of all polyynes reported to date with a length of at least 16 sp-carbons is included, combined with an account of methods used for their characterization.
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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) | 0.000 | 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) | 0.005 | 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 it