Sequential Hydrocarbon C—H Bond Activations by 16-Electron Organometallic Complexes of Molybdenum and Tungsten
Why this work is in the frame
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Bibliographic record
Abstract
Cp*M(NO)(hydrocarbyl)2 complexes (Cp* = η5-C5Me5) of molybdenum and tungsten exhibit hydrocarbyl-dependent thermal chemistry. Thus, gentle thermolysis of appropriate Cp*M(NO)(hydrocarbyl)2 precursors (M = Mo, W) results in the loss of hydrocarbon and the transient formation of 16-electron Cp*M(NO)-containing complexes such as Cp*M-(NO)(alkylidene), Cp*M(NO)(η2-benzyne), Cp*M(NO)(η2-acetylene), and Cp*M(NO)(η2-allene). These intermediates effect single, double, or triple activation of hydrocarbon C-H bonds intermolecularly, the first step of these activations being the reverse of the transformations by which they were generated. This Chapter summarizes the various types of C-H activations that have been effected with these organometallic nitrosyl complexes to date and presents some of the results of kinetic, mechanistic, and theoretical investigations of these processes.
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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 | 0.000 |
| 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) | 0.000 | 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 it