Tris(biphenyl‐4‐yl)silyl‐Endcapped Polyynes
Bibliographic record
Abstract
Abstract The use of tris(biphenyl‐4‐yl)silyl (TBPS) as a large protecting group for polyynes has been investigated. The basic building block, TBPS–C≡C–TMS ( 1 ), is synthesized in a new “one‐pot” reaction through the sequential addition of lithiated nucleophiles to tetrachlorosilane. The TMS group of differentially protected 1 and the diyne 5 can be selectively removed in the presence of the TBPS group under mild conditions, allowing for the formation of TBPS‐endcapped di‐ and tetraynes ( 3 and 9 ) by oxidative homocoupling. For the triyne, TBPS–(C≡C) 3 –TMS ( 11 ), chemoselectivity for desilylation decreases dramatically, preventing formation of the corresponding hexayne. X‐ray crystallographic analysis of 3 confirms a diameter of 20 Å for the TBPS group. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.028 | 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 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".