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 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) | 0.001 | 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 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.049 | 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".