Intramolecular C−H Activation Directed Self-Assembly of an Organoplatinum(II) Molecular Square
Bibliographic record
Abstract
A Pt(II) complex that contains a N, N -chelate ligand with the formula of Pt(NPA)(CH 3 ) 2 ( 1 ), NPA = N -(2‘-pyridyl)-7-azaindole, has been found to undergo a rapid chelate ring opening and “roll-over” process that leads to intramolecular C−H activation and the subsequent formation of a rare organoplatinum Pt 4 macrocycle, Pt 4 (CH 3 ) 4 ( N, C, N -NPA) 4 ( 2 ), without extra linkers. Complex 2 has been fully characterized by NMR, elemental, and X-ray diffraction analyses. Kinetic study using NMR spectroscopy has established that, in the absence of strong coordinating solvent molecules, the rate-determining step for the conversion process of 1 to 2 is the C−H cleavage step, and 2 is formed exclusively. The presence of strong coordinating solvent molecules, such as CH 3 CN, terminates the reaction at the Pt(CH 3 )( N, C -NPA)(L) formation step where L = the solvent molecule. The facile roll-over intramolecular C−H activation and the facile and selective formation of the cyclic Pt 4 complex by compound 1 are attributed to the poor stability of the N, N -chelate mode and the geometry of NPA.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 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; 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".