FTIR Analysis of Dimethyl Ether Decomposition Products Following Charge Transfer Ionization with Ar<sup>+</sup> under Matrix Isolation Conditions
Bibliographic record
Abstract
Fourier transform infrared spectroscopic analysis has been performed on argon matrices formed following electron bombardment of argon/dimethyl ether mixtures. Products consistent with the ionization and subsequent fragmentation of dimethyl ether cation have been observed. Following ionization of dimethyl ether, fragmentation occurs that is consistent with ionization energy greater than 15 eV due to efficient charge transfer from dimethyl ether to Ar(+) as the major ionization process. Major products observed in the infrared spectra are methane, formaldehyde, HCO(*), CO, and Ar(2)H(+). These products are consistent with the known fragmentation of photoionized dimethyl ether in a 15-16 eV ionization energy range. However, the observation of dehydrogenated products is consistent with additional abstraction of hydrogen from proximally located species isolated within the matrix. Analogous experiments employing CD(3)OCH(3) give similar results, and the observed isotopically substituted products are consistent with the proposed fragmentation pathways.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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) | 0.000 | 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 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".