Not Too Big and Not Too Small: “Goldilocks” Anion Size for Three-Dimensional Metal–Organic Frameworks Containing Oligothiophene Dinitrile Ligands (C<sub>4</sub>H<sub>2</sub>S)<sub><i>n</i></sub>(CN)<sub>2</sub> (<i>n</i> = 1, 2, 3) Bridging Silver(I) Cations
Bibliographic record
Abstract
A series of oligothiophene dinitriles, containing one, two, or three oligothiophene rings between nitrile donors NC-(C 4 H 2 S) n -CN are reacted with silver(I) salts to form coordination compounds. In most cases, the resulting metal–organic frameworks are one-dimensional coordination polymers containing roughly linear divalent Ag(I) centers. However, in the case of bithiophene ( n = 2) and terthiophene ( n = 3) bridges, a three-dimensional structure is also possible if the silver(I) counterion is just the right size to fit into the diamondoid pores that form with four-coordinate tetrahedrally oriented Ag(I) centers. Thus, only ClO 4 – and BF 4 – form three-dimensional structures with the bithiophene-bridged ligands, while the larger CF 3 SO 3 – and SbF 6 – anions will support a three-dimensional structure for the terthiophene-bridged ligand. Any counterion larger or smaller than the “just right” size will result in the one-dimensional structure instead.
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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 | 0.003 | 0.004 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.003 |
| 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 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".