Photo-oxidation of dimethyl malonate initiated by chlorine atoms in gas phase: Kinetics and mechanism
Rimondino, GN; Henao, DP; Peláez, WJ; Argüello, GA; Malanca, FE
HERO ID
4923463
Reference Type
Journal Article
Year
2017
Language
English
PMID
| HERO ID | 4923463 |
|---|---|
| In Press | No |
| Year | 2017 |
| Title | Photo-oxidation of dimethyl malonate initiated by chlorine atoms in gas phase: Kinetics and mechanism |
| Authors | Rimondino, GN; Henao, DP; Peláez, WJ; Argüello, GA; Malanca, FE |
| Journal | Journal of Physical Chemistry A |
| Volume | 121 |
| Issue | 45 |
| Page Numbers | 8577-8582 |
| Abstract | The rate coefficient for the gas-phase reaction of chlorine atoms with dimethyl malonate (DMM, CH3OC(O)CH2C(O)OCH3) was determined at 298 K using relative methods giving a value of (3.8 ± 0.4) × 10-12, cm3 molecule-1 s-1). The photo-oxidation mechanism of DMM was also investigated. The main products were identified by infrared spectroscopy, and computational calculations were performed in order to support the experimental data. The results reveal that the photo-oxidation occurs mainly by the abstraction of an H atom from the methyl groups. The CH3OC(O)CH2C(O)OCH2O• radical formed subsequently reacts according to three competitive paths: reaction with molecular oxygen to yield CH3OC(O)CH2C(O)OC(O)H, isomerization-unimolecular decomposition to lead finally to CH3OC(O)C(O)H, CO2, and HC(O)OH, and α-ester rearrangement to form monomethyl malonate and carbon monoxide. The yield of products as a function of oxygen pressure was also determined. |
| Doi | 10.1021/acs.jpca.7b06595 |
| Pmid | 29067806 |
| Wosid | WOS:000416203500004 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Is Peer Review | Yes |