Temperature dependence of the reactions of Cl with toluene and the xylenes
Bibliographic record
Abstract
Abstract The temperature dependence of the rate coefficients for the reactions of Cl with toluene and the xylenes was examined from 290 to 362 K. Chemical analysis was by gas chromatography. The relative rate method was used for the kinetic analysis, and the relative rate coefficients were converted to absolute values using absolute rate coefficients for the reference reactions obtained from recent critical evaluations. Most of the measurements were made at a total pressure of approximately 100 kPa in argon. There was very little temperature dependence, and variation of the total pressure and the concentration of O 2 had no effect. The values of the absolute rate coefficients were independent of the reference reaction used. The reaction of Cl with toluene was studied relative to the reactions of Cl with isobutane, ethane, propane, and n ‐butane. The results were virtually independent of temperature, giving a mean value of (5 ± 1) × 10 −11 cm 3 molecule –1 s −1 for the absolute rate coefficient at 95% confidence. The reactions of Cl with the xylenes were studied relative to the reactions of Cl with isobutane, ethane, and propane. The rate coefficients were independent of the xylene isomer and had a very small negative dependence on temperature. The mean value of the absolute rate coefficient at 298 K was (1.4 ± 0.3) × 10 −10 cm 3 molecule −1 s –1 at the 95% confidence level. The results are in satisfactory agreement with those in the literature, all of which were measured at fixed temperatures very close to 298 K. The kinetic results are discussed in relation to published descriptions of the dynamics of reactions of Cl and OH with organic compounds.
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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 | 0.000 |
| 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 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".