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- W2971925456 endingPage "8121" @default.
- W2971925456 startingPage "8109" @default.
- W2971925456 abstract "The photochemistry of glyoxylic acid (HC(O)C(O)OH) is explored in the near UV in both the singlet (S1/S0) and triplet (T1) manifolds using density functional theory (M06-2X/aug-cc-pVTZ) to reach an overall mechanistic picture of the atmospherically relevant photochemistry in the gas phase. The calculated energies and structures are also used in RRKM kinetics calculations to compare the relative reaction rates on each of these electronic states. The major photolysis pathways are two possible photodecarboxylation reactions: direct C–C bond cleavage (Norrish Type I reaction) and β-hydrogen transfer followed by CO2 loss. These results indicate that from λ = 350–380 nm both photodecarboxylation pathways can occur following intersystem crossing to the T1 surface. However, hydrogen transfer–decarboxylation initiated on S1 becomes increasingly important at λ < 350 nm. At the lower energy UV wavelengths available in the atmosphere (λ = 380–400 nm), reactions can only occur in S0 where concerted hydrogen transfer–decarboxylation is the dominant dissociation pathway with some minor contributions from CO loss/decarbonylation reactions." @default.
- W2971925456 created "2019-09-12" @default.
- W2971925456 creator A5030899701 @default.
- W2971925456 creator A5072143095 @default.
- W2971925456 creator A5085715052 @default.
- W2971925456 date "2019-09-05" @default.
- W2971925456 modified "2023-09-25" @default.
- W2971925456 title "Theoretical Investigation of the Atmospheric Photochemistry of Glyoxylic Acid in the Gas Phase" @default.
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