Transition Metal‐Catalyzed Ring‐Opening Polymerization of Silicon‐Bridged [1]Ferrocenophanes in the Presence of Functional Silanes: Molecular Weight Control and Synthesis of Telechelic Poly(ferrocenylsilanes)
Bibliographic record
Abstract
Abstract The transition metal‐catalyzed ring‐opening polymerization of dimethyl[1]silaferrocenophane (fcSiMe 2 ) ( 1 ), fc = Fe( η ‐C 5 H 4 ) 2 ), in the presence of MePhSiH 2 , or the chlorosilanes ClMe 2 SiH, ClMePhSiH, or ClPh 2 SiH has been shown to allow access to poly(ferrocenylsilane)s R 1 R 2 R 3 Si[fcSiMe 2 ] n H ( 4 , 6 – 8 ), and R 1 [Me 2 Sifc] m SiR 2 R 3 [fcSiMe 2 ] n H ( 5 ) with controlled molecular weights and which are capped by the corresponding R 1 R 2 R 3 Si and SiH groups ( 4 , 5 : R 1 = H, R 2 = Me, R 3 = Ph, 6 : R 1 = Cl, R 2 = R 3 = Me, 7 : R 1 = Cl, R 2 = Me, R 3 = Ph, 8 : R 1 = Cl, R 2 = R 3 = Ph). Materials with molecular weights in the range M n of 3.5 × 10 3 to 2.5 × 10 4 and polydispersities of 1.3–2.2 were prepared. All of the silanes examined in this study were found to be more reactive as capping agents than the previously studied Et 3 SiH; the order of reactivity for molecular weight control was determined to be MePhSiH 2 ≈ ClMe 2 SiH ≈ ClMePhSiH ≈ ClPh 2 SiH > Et 3 SiH. In addition, the reactivity of the resulting SiCl end‐functionalities of poly(ferrocenylsilane)s 6 and 7 was explored, and reactions with commercial poly(ethylene glycol) methyl ether yielded poly(ethylene oxide)– block –poly(ferrocenylsilane) diblock copolymers, 10 and 11 . The SiH end group, however, was much less reactive and attempts to utilize this functionality for hydrosilylation of divinyl‐terminated poly(dimethylsiloxane) to form block copolymers was ineffective. magnified image
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 | 0.000 | 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) | 0.000 | 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".