CRYSTAL STRUCTURES OF TETRAKIS(p-ETHYLPHENYL)TIN(IV) AND TETRAKIS(p-t-BUTYLPHENYL)TIN(IV)
Why this work is in the frame
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Bibliographic record
Abstract
Single-crystal X-ray studies of (p-CzHsCsHi^Sn (A) and l/KCH.OaCCsH^Sn (B) have been undertaken to determine the effect of increasing /wa-substituent size on the structures of tetra-aryltins. Molecules of (A) are almost tetrahedral at tin but have 2-fold symmetry. The p-C2H5 groups are perpendicular to the phenyl ring planes having the all exo-conformation in one-half of the molecule but equally disordered (1exo/endo) in the other half. In contrast (B) crystallises in the unusual tetragonal space group PAiln, with molecules having -4 symmetry. Four /-butyl groups from four adjacent AnSn molecules form a tetrahedral array around parallel 42 axes resulting in strongly directional intermolecular forces and a highly ordered and robust diamantoid network structure for (B).
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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) | 0.001 | 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) | 0.035 | 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