Protonolysis of Dimethylplatinum(II) Complexes: Primary Attack at Metal or Ligand
Bibliographic record
Abstract
The complexes [PtMe 2 (DMEP)], 1, and [PtMe 2 (DMPP)], 2 [DMEP, DMPP = Me 2 N(CH 2 ) n N CH-2-C 5 H 4 N, n = 2, 3, respectively], contain ligands that chelate to platinum through the imine and pyridyl groups, with the tertiary amine group not coordinated. Methyl iodide reacted with complex 1 to give [PtIMe 3 (DMEP)] but reacted with 2 to give a mixture of [PtIMe 3 (DMPP)] and [PtMe 3 (DMPP)]I, indicating the greater ability of DMPP to act as a fac -tridentate ligand. Complex 2 reacted with MeO 3 SCF 3 to form [PtMe 3 (DMPP)][CF 3 SO 3 ] only. The primary reaction of 1 and 2 with HX (X = Cl, O 2 CCF 3, or O 3 SCF 3 ) occurred by protonation of the pendant amine, while with excess acid, a methylplatinum bond trans to imine was cleaved selectively. Two products of protonolysis, namely [PtMe(DMEP)][O 3 SCF 3 ], containing mer -tridentate DMEP, and [PtMe(O 2 CCF 3 )(DMEPH)][O 2 CCF 3 ], with a protonated bidentate DMEP ligand, have been characterized by structure determinations, and the reaction pathways have been deduced by monitoring the reactions by 1 H NMR at varying temperature. In the reaction of 2 with HCl, an intermediate hydridoplatinum(IV) complex [PtHClMe 2 (DMPPH)][Cl] was detected and determined to be stable up to −30 °C, when it decomposed to give methane and [PtClMe(DMPPH)][Cl].
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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 | 0.001 |
| 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) | 0.405 | 0.001 |
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".