2565-30-2Relevant articles and documents
Reactions of chloroethenes with atomic chlorine in air at atmospheric pressure
Morozov,Nielsen,Morozova,Vasiliev,Loukhovitskaya
, p. 754 - 760 (2010)
Relative rate method at the temperature of 298 K and pressure of 1013 hPa and GC-MS detection were used for the study of kinetics of the reactions of Cl atoms with H2C=CCl2, cis-ClHC=CHCl, trans-ClHC=CHCl, ClHC=CCl2, and Cl2C=CCl2. The reaction products were identified by FTIR spectroscopy. A mechanism for the atmospheric degradation of chloro-ethenes has been suggested.
Matrix isolation study of the photochemically induced reaction of ozone with dibromochloromethane and bromodichloromethane in solid argon at 14 K. FT-IR spectra of the complexes C(O)HCl ... BrX, C(O)HBr ... XCl, C(O)BrCl ... HX, (OC)(HCl)(Br2), (OC)(HBr)(Cl2), and (OC)(BrCl)(HX) (where X = Br or Cl)
Clark, Robin J. H.,Dann, Jonathan R.,Foley, Loraine J.
, p. 73 - 78 (1999)
Quartz-filtered (λ > 240 nm) photolysis of either ozone/dibromochloromethane or ozone/bromodichloromethane in an argon matrix at 14 K has been shown by FT-IR spectroscopy to lead to the formation of the carbonyl ... Lewis acid complexes C(O)HCl ... BrX, C(O)HBr ... XCl, C(O)BrCl ... HX, and C(O)Cl2 ... HBr, where X = Br or Cl, depending on the trihalogenomethane used. Several of these complexes are new and are formed by either hydrogen halide or dihalogen abstraction reactions. Upon further irradiation the carbonyl complexes dissociate to form the new carbon monoxide complexes (OC)(HCl)(Br2), (OC)(HBr)(Cl2), and (OC)(BrCl)(HX). Thus the photo-induced reactions of ozone with trihalogenomethanes lead to the formation of new carbonyl and carbon monoxide complexes whose vibrational properties are well characterised by FT-IR spectroscopy. Suggested pathways for the photolyses are presented.
Reactions of Three Lactones with Cl, OD, and O3: Atmospheric Impact and Trends in Furan Reactivity
Ausmeel,Andersen,Nielsen,?sterstr?m,Johnson,Nilsson
, p. 4123 - 4131 (2017/06/23)
Lactones, cyclic esters of hydroxycarboxylic acids, are interesting biofuel candidates as they can be made from cellulosic biomass and have favorable physical and chemical properties for distribution and use. The reactions of γ-valerolactone (GVL), γ-crotonolactone (2(5H)-F), and α-methyl-γ-crotonolactone (3M-2(5H)-F) with Cl, OD, and O3 were investigated in a static chamber at 700 Torr and 298 ± 2 K. The relative rate method was used to determine kGVL+Cl = (4.56 ± 0.51) × 10-11, kGVL+OD = (2.94 ± 0.41) × 10-11, k2(5H)-F+Cl = (2.94 ± 0.41) × 10-11, k2(5H)-F+OD = (4.06 ± 0.073) × 10-12, k3M-2(5H)-F+Cl = (16.1 ± 1.8) × 10-11, and k3M-2(5H)-F+OD = (12.6 ± 0.52) × 10-12, all rate coefficients in units of cm3 molecule-1 s-1. An absolute rate method was used to determine k2(5H)-F+O3 = (6.73 ± 0.18) × 10-20 and k3M-2(5H)-F+O3 = (5.42 ± 1.23) × 10-19 in units of cm3 molecule-1 s-1. Products were identified for reactions of the lactones with Cl. In the presence of O2 the products are formic acid (HCOOH), formyl chloride (CHClO), and phosgene (CCl2O), and also maleic anhydride (C2H2(CO)2O) for 2(5H)-F. In addition both reactions produced a number of unidentified products that likely belong to molecules with the ring-structure intact. A review of literature data for reactions of other furans show that the reactivity of the lactones are generally lower compared to that of corresponding compounds without the carbonyl group.
Atmospheric chemistry of t-CF3CHCHCl: Products and mechanisms of the gas-phase reactions with chlorine atoms and hydroxyl radicals
Andersen, M. P. Sulbaek,Nielsen,Hurley,Wallington
experimental part, p. 1735 - 1748 (2012/04/23)
FTIR-smog chamber techniques were used to study the products and mechanisms of the Cl atom and OH radical initiated oxidation of trans-3,3,3-trifluoro-1- chloro-propene, t-CF3CHCHCl, in 700 Torr of air or N 2/O2 diluent at 296 ± 2 K. The reactions of Cl atoms and OH radicals with t-CF3CHCHCl occur via addition to the CC double bond; chlorine atoms add 15 ± 5% at the terminal carbon and 85 ± 5% at the central carbon, OH radicals add approximately 40% at the terminal carbon and 60% at the central carbon. The major products in the Cl atom initiated oxidation of t-CF3CHCHCl were CF3CHClCHO and CF3C(O)CHCl2, minor products were CF3CHO, HCOCl and CF3COCl. The yields of CF3C(O)CHCl2, CF3CHClCOCl and CF3COCl increased at the expense of CF3CHO, HCOCl and CF3CHClCHO as the O2 partial pressure was increased over the range 10-700 Torr. Chemical activation plays a significant role in the fate of CF3CH(O)CHCl2 and CF 3CClHCHClO radicals. In addition to reaction with O2 to yield CF3COCl and HO2 the major competing fate of CF 3CHClO is Cl elimination to give CF3CHO (not C-C bond scission as previously thought). As part of this study k(Cl + CF 3C(O)CHCl2) = (2.3 ± 0.3) × 10-14 and k(Cl + CF3CHClCHO) = (7.5 ± 2.0) × 10-12 cm3 molecule-1 s-1 were determined using relative rate techniques. Reaction with OH radicals is the major atmospheric sink for t-CF3CHCHCl. Chlorine atom elimination giving the enol CF3CHCHOH appears to be the sole atmospheric fate of the CF 3CHCHClOH radicals. The yield of CF3COOH in the atmospheric oxidation of t-CF3CHCHCl will be negligible (3CHCHCl. the Owner Societies 2012.