Bulky 2,6-disubstituted aryl siloxanes and a disilanamine
Bibliographic record
Abstract
The crystal structures of 5-bromo-1,3-di- tert- butyl-2-[(trimethylsilyl)oxy]benzene, C 17 H 29 BrOSi, (I), 1,3-di- tert- butyl-2-[(trimethylsilyl)oxy]benzene, C 17 H 30 OSi, (II), and N -(2,6-diisopropylphenyl)-1,1,1-trimethyl- N -(trimethylsilyl)silanamine, C 18 H 35 NSi 2 , (III), are reported. Compound (I) crystallizes in space group P 2 1 / c with Z ′ = 1, (II) in Pnma with Z ′ = 0.5 and (III) in Cmcm with Z ′ = 0.25. Consequently, the molecules of (II) are constrained by m and those of (III) by m 2 m site symmetries. Despite this, both (I) and (II) are distorted towards mild boat conformations, as is typical of 2,6-di- tert- butyl-substituted phenyl compounds, reflecting the high local steric pressure of the flanking alkyl groups. Compound (III) by contrast is planar and symmetric, and this lack of distortion is compatible with the lower steric pressure of the flanking 2,6-diisopropyl substituents.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".