32720-34-6Relevant academic research and scientific papers
Atmospheric Chemistry of 1,3-Dioxolane: Kinetic, Mechanistic, and Modeling Study of OH Radical Initiated Oxidation
Sauer,Barnes,Becker,Geiger,Wallington,Christensen,Platz,Nielsen
, p. 5959 - 5966 (1999)
An absolute rate pulse radiolysis technique was used to measure k(OH + 1,3-dioxolane) = (8.8 ± 0.9) × 10-12 cm3 molecule-1 s-1 at 295 K in 1000 mbar of Ar. Relative rate techniques were used to study the reactions of OH radicals and Cl atoms with 1,3-dioxolane and Cl atoms with ethylene carbonate and methylene glycol diformate at 300 K in 1 bar of synthetic air. Rate coefficients were k(OH + 1,3-dioxolane) = (1.04 ± 0.16) × 10-11, k(Cl + 1,3-dioxolane) = (1.6 ± 0.3) × 10-10, k(Cl + ethylene carbonate) = (7.1 ± 1.7) × 10-12, and k(Cl + methylene glycol diformate) = (5.6 ± 0.7) × 10-13 cm3 molecule-1 s-1. OH radical and chlorine atom initiated oxidation of 1,3-dioxolane in 1 bar of N2/O2 mixtures at 298 K in the presence of NOx gives ethylene carbonate and methylene glycol diformate. Molar yields of ethylene carbonate and methylene glycol diformate were 0.48 ± 0.07 and 0.50 ± 0.14 for OH radical initiation and 0.43 ± 0.07 and 0.53 ± 0.07 for Cl atom initiation. Product yields were independent of O2 partial pressure over the range studied (60-800 mbar). A photochemical mechanism was developed to describe the OH-initiated degradation of 1,3-dioxolane in the presence of NOx. The results are discussed with respect to the available literature data concerning the atmospheric chemistry of ethers.
Product study of the OH radical and Cl atom initiated oxidation of 1,3-dioxane
Moriarty, Jennie,Wenger, John C.,Sidebottom, Howard W.
experimental part, p. 3980 - 3986 (2011/10/02)
The products of the hydroxyl (OH) radical and chlorine (Cl) atom initiated oxidation of 1,3-dioxane are determined under various reaction conditions in a 50 L teflon reaction chamber using FTIR spectroscopy for analysis. The major products detected in all experiments are (2-oxoethoxy)methyl formate, formic acid and methylene glycol diformate with average molar yields of 0.50±0.05, 0.41±0.02 and 0.03±0.01 respectively for the OH initiated oxidation in the presence of NOx. The yields of these products do not vary significantly with O2 partial pressure or oxidising agent (OH or Cl). However, the yield of formic acid decreased by at least a factor of two in the absence of NOx. The results of these experiments are used to elucidate a simplified gas-phase atmospheric degradation scheme for 1,3-dioxane and also provide valuable information on the atmospheric fate of the cyclic and linear alkoxy radicals produced in these and similar reactions. The available experimental data suggests that the relative importance of the competing pathways (reaction with O2 and ring opening by C-C or C-O bond fission) is a strong function of the ring strain in the cycloalkoxy radicals.
