A ternary Cu–Sn–S cluster complex—(NBu4)[Cu19S28(SnPh)12(PEt2Ph)3]
Bibliographic record
Abstract
Reaction of a mixture of CuCl, PhSnCl(3) and PEt(2)Ph with S(SiMe(3))(2) in THF resulted initially in the unexpected synthesis of the ionic, mixed copper-tin sulfide cluster [Li(thf)(4)][Cu(19)S(28)(SnPh)(12)(PEt(2)Ph)(3)] in low yields. However, by adding NBu(4)Cl to the reaction solutions we were able to selectively synthesize the structurally similar cluster ion in (NBu(4))[Cu(19)S(28)(SnPh)(12)(PEt(2)Ph)(3)]. Structural characterization by single crystal X-ray analysis reveals that the cluster anions consist in principle of a copper sulfide core decorated by PhSn(3+) groups. Although additional phosphine ligands are attached to copper atoms the clusters possess an open 'Cu(3)S(3)' face mostly protected by the [Li(thf)(4)](+) and (NBu(4))(+) counterions in the crystal structure. The cluster (NBu(4))[Cu(19)S(28)(SnPh)(12)(PEt(2)Ph)(3)] displays near-infrared, temperature-dependent photoluminescence at ∼820-930 nm in the solid state, which is especially bright at temperatures below ∼100 K.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 0.002 |
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; both teacher heads agree on what is shown here.
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".