Atmospheric Chemistry and Environmental Assessment of Inhalational Fluroxene

Kinetic and Mechanistic Investigation for the Gas-Phase Tropospheric Photo-oxidation Reactions of 2,2,2-Trifluoroethyl Acrylate with OH Radicals and Cl Atoms

The photo-oxidation of 2,2,2-trifluoroethyl acrylate (TFEA) (CH₂CHC(O)OCH₂CF₃) initiated by OH radicals and Cl atoms was investigated in tropospheric conditions using both experimental and computational methods. The kinetic measurements were carried out in the temperature range of 268-363 K using the relative rate method. The rate coefficients for the reaction of OH radicals with TFEA were measured relative to diethyl ether, ethylene, and acetaldehyde. The rate coefficients for the reaction of Cl atoms with TFEA were measured relative to propylene and ethylene. The rate coefficients for the reaction of TFEA with OH radicals and Cl atoms at 298 K were experimentally measured to be k_R1^{exp - 298 K} = (1.41 ± 0.31) × 10^-11 cm³ molecule^-1 s^-1 and k_R2^{exp - 298 K} = (2.37 ± 0.50) × 10^-10 cm³ molecule^-1 s^-1, respectively. The deduced temperature-dependent Arrhenius expressions for the reactions of OH radicals and Cl atoms with TFEA are k_R1^{exp - (268 - 363 K)} = (9.82 ± 1.37) × 10^-12 exp. [(812 ± 152)/T] cm³ molecule^-1 s^-1 and k_R2^{exp - (268 - 363 K)} = (1.25 ± 0.17) × 10^-11 exp. [(862 ± 85)/T] cm³ molecule^-1 s^-1, respectively. To complement our experimental results, computational calculations were performed at CCSD(T)/cc-pVDZ//M062X/6-31+G(d,p) and CCSD(T)/cc-pVDZ//MP2/6-311+G(d,p) levels of theory, respectively, in combination with canonical variational transition-state theory (CVT) with small curvature tunneling (SCT) over the temperature range of 200-400 K. Furthermore, the degradation mechanisms initiated by OH radicals and Cl atoms were proposed for the titled reactions based on the qualitative analysis of the products in gas chromatography-mass spectrometry (GC-MS) and gas chromatography-infrared spectroscopy (GC-IR). Atmospheric implications, thermochemistry, and branching ratios for the titled reactions are discussed in detail in the paper.

The environmental impact of unsaturated fluoroesters: atmospheric chemistry towards OH radicals and Cl atoms, radiative behavior and cumulative ozone creation

Atmospheric lifetimes, reaction mechanisms, infrared spectra, radiative forcing efficiencies, global warming potentials and ozone creation potentials of the allyl and vinyl trifluoroacetate were determined to assess their environmental impact.

Theoretical investigation of atmospheric chemistry of volatile anaesthetic sevoflurane: reactions with the OH radicals and atmospheric fate of the alkoxy radical (CF3)2CHOCHFO: thermal decomposition vs. oxidation

Reaction profile (kcal mol⁻¹) for (CF₃)₂CHOCHFO radical at the M06-2X/6-311++G(d,p) level.