Binuclear Organoplatinum(IV) Complexes with Bridging Xylenediyl Groups: Formation of Supramolecular Polymers through Hydrogen Bonding
Bibliographic record
Abstract
Oxidative addition reactions of α,α′-dibromo- o -xylene, - m -xylene, and - p -xylene to two units of [PtMe 2 (bu 2 bipy)], bu 2 bipy = 4,4′-di- t -butyl-2,2′-bipyridine, give the corresponding binuclear organoplatinum(IV) complexes with bridging xylenediyl groups, [C 6 H 4 {CH 2 PtBrMe 2 (bu 2 bipy)} 2 ]. Oxidative addition of C 6 -1,3,5-Me 3 -2,4,6-(CH 2 Br) 3 to three units of [PtMe 2 (bu 2 bipy)] gave the triplatinum(IV) complex [C 6 -1,3,5-Me 3 -2,4,6-{CH 2 PtBrMe 2 (bu 2 bipy)} 2 ]. In the sterically congested complexes 1,2-[C 6 H 4 {CH 2 PtBrMe 2 (bu 2 bipy)} 2 ] and [C 6 -1,3,5-Me 3 -2,4,6-{CH 2 PtBrMe 2 (bu 2 bipy)} 2 ], there is restricted rotation of the xylylplatinum groups. Bromide abstraction from the binuclear bromoplatinum(IV) complexes with AgPF 6, followed by the addition of a pyridine ligand with one or two carboxylic acid functional groups, gave binuclear organoplatinum(IV) compounds containing at least two carboxylic acid groups, with the potential to polymerize through intermolecular hydrogen-bonding interaction in the solid state. During crystallization of the platinum(IV) complexes, hydrolysis of the hexafluorophosphate anions occurred to give PO 2 F 2 −, HPO 3 F −, or H 2 PO 4 − anions, and these were found to take part in hydrogen bonding with the carboxylic acid groups or to displace the functionalized pyridine ligand. Several binuclear organoplatinum(IV) complexes and supramolecular polymers were structurally characterized.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.012 | 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 teacher head, 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".