Chirped-Pulse and Cavity-Based Fourier Transform Microwave Spectroscopy of a Chiral Epoxy Ester: Methyl Glycidate
Why this work is in the frame
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Bibliographic record
Abstract
Rotational spectra of a chiral epoxy ester, methyl glycidate, were measured using a chirped-pulse and a cavity-based Fourier transform microwave spectrometer. The two lowest energy conformers where the epoxy oxygen and the ester oxygen atoms are in the syn and anti relative orientation with respect to each other were identified experimentally. Spectra of four (13)C isotopologues of the lowest energy conformer of methyl glycidate were also measured and assigned. All of the observed rotational transitions are split into doublets due to the presence of the ester methyl internal rotor. The rotational constants and the internal rotation barrier height for the ester methyl group were determined for both conformers of methyl glycidate and for the four (13)C isotopologues of the most stable conformer. A value for the interconversion barrier between the two most stable conformers was estimated. Furthermore, comparison to strawberry aldehyde, a larger derivative of methyl glycidate, shows how the syn-anti conformational equilibrium shifts as a result of the additional bulky substituents at the epoxy ring and at the ester oxygen atom.
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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 | 0.001 |
| 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