The Chemistry of [PtMe<sub>2</sub>(1,2-bis(2-pyridyl)ethane)]: Remarkable Impact of an Easily Dissociated Chelate Ligand
Bibliographic record
Abstract
The title compound [PtMe 2 (bpe)], 1, bpe = 1,2-bis(2-pyridyl)ethane, is easily oxidized to give octahedral organoplatinum(IV) complexes, and the subsequent chemistry is profoundly influenced by the accompanying strain induced in the seven-membered Pt(bpe) chelate ring. In reactions with bromine or iodine, X 2, the platinum(IV) complexes [PtX 2 Me 2 (bpe)] are formed initially, but they decompose primarily by reductive elimination of MeX to give ultimately the platinum(II) complexes [PtX 2 (bpe)]. When X = I, a minor reaction occurred to give the first example of metalation of a CH 2 group of the bpe ligand. On reaction of 1 with HCl, the initial product [PtHClMe 2 (bpe)] undergoes reductive elimination of methane to form [PtClMe(bpe)]. In contrast, methyl iodide reacts with 1 to give [PtIMe 3 (bpe)], and this decomposes by loss of the bpe ligand to give the cubane [(PtIMe 3 ) 4 ] and not by reductive elimination. Finally, a new class of platinum(IV) double cubane clusters was obtained on oxidation of complex 1 either with hydrogen peroxide to give [Pt 4 (μ-OH) 4 (μ 3 -OH) 2 Me 10 ], as a mixed complex with [PtMe 2 (CO 3 )(bpe)], or with oxygen in methanol to give [Pt 4 (μ-OH) 2 (μ-OMe) 2 (μ 3 -OMe) 2 Me 10 ].
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 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".