Synthesis and characterization of tin containing polyhedral oligometallasilsesquioxanes (POMSS)
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Bibliographic record
Abstract
Tin silicate species have shown good catalytic activity in various oxidation reactions. In an attempt to mimic surface tin species, several tin containing silsesquioxanes have been synthesized. Incompletely condensed silsesquioxanes ( c-C 5H 9) 7Si 7O 9(OH) 3 and ( c-C 5H 9) 7Si 7O 9(OSiMe 3)(OH) 2 were reacted with common tin-precursors, which afforded several silsesquioxane ligated tin compounds. Divalent stannasilsesquioxanes form dimers of the type [( c-C 5H 9) 7Si 7O 11(OX)Sn] 2 (X = H, SiMe 3) with three-coordinated tin centers. The three-coordinated tin( II) are hydrolytically unstable whereas the octahedrally surrounded tetravalent stannasilsesquioxanes [( c-C 5H 9) 7Si 7O 11(OX)]Sn(acac) 2 (X = H, OSiMe 3) are hydrolytically robust. An unprecedented anionic trimeric cluster, {[( c-C 5H 9) 7Si 7O 12Sn] 3(μ 2-OH) 3(μ 3-OH)} −{HNEt 3} +, stabilized by bridging hydroxyl groups was formed when the product formed upon reacting ( c-C 5H 9) 7Si 7O 9(OH) 3 with SnCl 4 was slowly hydrolyzed. The stannasilsesquioxanes showed no catalytic activity in oxidation reactions.
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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) | 0.001 | 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