A new method of syntheses of 18-membered macrocyclic diphenyltin(IV) compounds and crystal structures of {Ph<sub>2</sub>Sn[S(C<sub>6</sub>H<sub>3</sub>NO)O]}<sub>3</sub>·Y (Y = 2H<sub>2</sub>O or 4C<sub>6</sub>H<sub>6</sub>) and {Ph<sub>3</sub>Sn[S(C<sub>6</sub>H<sub>3</sub>NO)O]SnPh<sub>3</sub>(EtOH)}·[EtOH]
Why this work is in the frame
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Bibliographic record
Abstract
Two diphenyltin(IV) compounds: {Ph 2 Sn[S(C 6 H 3 NO)O]} 3 ·Y (Y = 2H 2 O, 1; 4C 6 H 6 , 2) have been unexpectedly obtained by the reactions of triphenyltin chloride with 2-mercaptonicotinic acid in the presence of Et 3 N. However, by the reaction of the same reactants in the presence of EtONa, only a new triphenyltin(IV) compound ({Ph 3 Sn[S(C 6 H 3 NO)O]SnPh 3 (EtOH)}·[EtOH], 3) was obtained. The X-ray analyses reveal that compounds 1 and 2 are trinuclear, 18-membered macrocyclic compounds while 3 is a dinuclear compound. Specially, π-π stacking interaction was recognized in crystals of compound 1, which makes it a dimer. Co-crystallization was found in the crystals of all the three compounds 1, 2, and 3, the co-crystallized solvent molecules are water, benzene, and ethanol molecules, respectively. A possible dephenylation mechanism of 1 and 2 was illustrated in detail.Key words: triphenyltin, 2-mercaptonicotinic acid, dephenylation, macrocyclic, π-π stacking interaction, co-crystallization, crystal structure.
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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 | 0.007 | 0.007 |
| Meta-epidemiology (narrow) | 0.013 | 0.014 |
| Meta-epidemiology (broad) | 0.016 | 0.008 |
| Bibliometrics | 0.006 | 0.009 |
| Science and technology studies | 0.005 | 0.007 |
| Scholarly communication | 0.004 | 0.006 |
| Open science | 0.009 | 0.003 |
| Research integrity | 0.009 | 0.012 |
| 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 it