Double Oxidative Addition of Tin(IV) Halides to Platinum(II): Complexes with Pt−Sn and Pt−Sn−Pt Linkages
Bibliographic record
Abstract
The electron-rich organoplatinum complex [PtMe 2 (bu 2 bpy)], 1, bu 2 bpy = 4,4‘-di- tert -butyl-2,2‘-bipyridine, undergoes easy oxidative addition of a Sn−Cl bond of Ph n SnCl 4 - n to give the corresponding stannylplatinum(IV) complexes [PtClMe 2 (SnPh n Cl 3 - n )(bu 2 bpy)], 2, n = 0; 3, n = 1; 4, n = 2; 5, n = 3. Further reaction of 1 with 2 or 3 can occur to give the μ-stannylene complexes [{PtClMe 2 (bu 2 bpy)} 2 (μ-SnPh n Cl 2 - n )], 6, n = 0; 7, n = 1, the first time that μ-stannylene complexes have been prepared by oxidative addition of Sn−Cl bonds. In all cases, the oxidative additions of Sn−Cl bonds to platinum(II) occurred with trans stereochemistry. The products are characterized by NMR spectroscopy and, in most cases, by X-ray structure determinations. Trends in coupling constants [especially 1 J (PtSn)] and bond distances and angles give insight into structure and bonding in the series of complexes. Complex 2 was cocrystallized with the organotin compound [Me 2 SnCl 2 .Me 2 SnO] 2 . The oxidative addition of GeCl 4 to complex 1 occurs with cis -stereochemistry to give [PtClMe 2 (GeCl 3 )(bu 2 bpy)], which does not react with more complex 1 to give a μ-germylene complex.
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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 | 0.001 | 0.001 |
| 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".