Polymers Containing 4‐, 5‐, and 6‐Membered Rings π‐Coordinated to Metallic Moieties
Bibliographic record
Abstract
The previous chapter dealt with so-called symmetrical sandwiched metallocenes. In addition to these more traditional symmetrical metallocenes, a wide variety of metal-containing macromolecules exist where the metal is bonded to a lone ring system or to an asymmetrical sandwich-like system. As in the case of the symmetrical metallocenes, attachment of the metal is via π or π-type bonding. Here, the metal is normally not part of the backbone but rather resides directly adjacent (pendent) to the backbone or is further removed from the backbone within side chains. The metal can be uncharged or present as a cation. Introduction of the metal-containing moiety has been achieved using all of the traditional synthetic routes. Metal carbonyls are often chosen as the metal-containing moiety for single ring systems. Generally, the metal-containing moiety is introduced in the polymer forming step, but there are ample examples of the metal being introduced to already-formed polymer systems. Some polymers have been produced using supramolecular assembly. Some appear as part of star, sheet, and dendrite structures.
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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 | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.013 | 0.004 |
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".