Double‐Decker Coordination Cages
Bibliographic record
Abstract
Bis(pyridin‐3‐ylmethyl) pyridine‐3,5‐dicarboxylate ( L ) possessing one internal and two terminal pyridine moieties displayed differential coordination ability when combined with suitable Pd II components. The compound L acted as a bidentate chelating ligand to form mononuclear complexes when combined with cis ‐[Pd(tmeda)(NO 3 ) 2 ] or Pd(NO 3 ) 2 in calculated ratios. The combination of Pd(NO 3 ) 2 with L in a ratio of 3:4, however, afforded the trinuclear “double‐decker” cage [(NO 3 ) 2 ⊂Pd 3 ( L ) 4 ](NO 3 ) 4 , in which L acts as a nonchelating tridentate ligand and the counter anion (i.e., NO 3 – ) acts as template. The encapsulated NO 3 – can be replaced by F – , Cl – , or Br – but not by I – . The F – ‐encapsulated cage could not be isolated due to its reactivity, whereas the Cl – or Br – encapsulated cages could be isolated. Although anionic guests such as NO 3 – , Cl – , or Br – stabilized the cages, the presence of excess Cl – or Br – (not NO 3 – ) facilitated decomplexation reactions releasing the ligand. The complexation of Pd(Y) 2 (Y = BF 4 – , PF 6 – , CF 3 SO 3 – , or ClO 4 – ) with L afforded the corresponding mononuclear complexes under appropriate conditions. However, these counter anions could not act as templates for the construction of double‐decker cages.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".