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    Henry's law constants and hydrolysis rate constants of 2,2,2-trifluoroethyl acetate and methyl trifluoroacetate

    New search for: Kutsuna, Shuzo
    New search for: Chen, Liang
    New search for: Ohno, Kayo
    New search for: Tokuhashi, Kazuaki
    New search for: Sekiya, Akira

    AbstractHenry's law constants (H) and hydrolysis rate constants (kh) of two fluorinated esters [CH3C(O)OCH2CF3 and CF3C(O)OCH3] were determined at 278–298K by a column-stripping method. The H value at 298K (H298) and the standard solvation enthalpy for gas-to-liquid transfer (ΔHsol) were determined from the van’t Hoff equation to be H 298 =0.58±0.04 M atm −1 and Δ H sol =− 44±3 kJ mol − 1 for CH3C(O)OCH2CF3, and H 298 =0.12±0.04 M atm − 1 and Δ H sol =− 41±16 kJ mol − 1 for CF3C(O)OCH3. Hydrolysis of CH3C(O)OCH2CF3 was not observed(k h <7×10 − 5 s − 1 ), whereas the kh value of CF3C(O)OCH3 was determined to be 10 5.3±2.0 exp{ − (5.07±1.27)×10 3 /T } s − 1 . The effects of pH and metal ions, and the salting-out effects of NaCl were also examined for CH3C(O)OCH2CF3. Dissolution in seawater is expected to be a significant tropospheric sink of these fluorinated esters.

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    Henry's law constants and hydrolysis rate constants of 2,2,2-trifluoroethyl acetate and methyl trifluoroacetate

    New search for: Kutsuna, Shuzo
    New search for: Chen, Liang
    New search for: Ohno, Kayo
    New search for: Tokuhashi, Kazuaki
    New search for: Sekiya, Akira

    AbstractHenry's law constants (H) and hydrolysis rate constants (kh) of two fluorinated esters [CH3C(O)OCH2CF3 and CF3C(O)OCH3] were determined at 278–298K by a column-stripping method. The H value at 298K (H298) and the standard solvation enthalpy for gas-to-liquid transfer (ΔHsol) were determined from the van’t Hoff equation to be H 298 =0.58±0.04 M atm −1 and Δ H sol =− 44±3 kJ mol − 1 for CH3C(O)OCH2CF3, and H 298 =0.12±0.04 M atm − 1 and Δ H sol =− 41±16 kJ mol − 1 for CF3C(O)OCH3. Hydrolysis of CH3C(O)OCH2CF3 was not observed(k h <7×10 − 5 s − 1 ), whereas the kh value of CF3C(O)OCH3 was determined to be 10 5.3±2.0 exp{ − (5.07±1.27)×10 3 /T } s − 1 . The effects of pH and metal ions, and the salting-out effects of NaCl were also examined for CH3C(O)OCH2CF3. Dissolution in seawater is expected to be a significant tropospheric sink of these fluorinated esters.

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    Henry's law constants and hydrolysis rate constants of 2,2,2-trifluoroethyl acetate and methyl trifluoroacetate

    New search for: Kutsuna, Shuzo
    New search for: Chen, Liang
    New search for: Ohno, Kayo
    New search for: Tokuhashi, Kazuaki
    New search for: Sekiya, Akira

    AbstractHenry's law constants (H) and hydrolysis rate constants (kh) of two fluorinated esters [CH3C(O)OCH2CF3 and CF3C(O)OCH3] were determined at 278–298K by a column-stripping method. The H value at 298K (H298) and the standard solvation enthalpy for gas-to-liquid transfer (ΔHsol) were determined from the van’t Hoff equation to be H 298 =0.58±0.04 M atm −1 and Δ H sol =− 44±3 kJ mol − 1 for CH3C(O)OCH2CF3, and H 298 =0.12±0.04 M atm − 1 and Δ H sol =− 41±16 kJ mol − 1 for CF3C(O)OCH3. Hydrolysis of CH3C(O)OCH2CF3 was not observed(k h <7×10 − 5 s − 1 ), whereas the kh value of CF3C(O)OCH3 was determined to be 10 5.3±2.0 exp{ − (5.07±1.27)×10 3 /T } s − 1 . The effects of pH and metal ions, and the salting-out effects of NaCl were also examined for CH3C(O)OCH2CF3. Dissolution in seawater is expected to be a significant tropospheric sink of these fluorinated esters.

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    Title:

    Henry's law constants and hydrolysis rate constants of 2,2,2-trifluoroethyl acetate and methyl trifluoroacetate

    Contributors:

    Kutsuna, Shuzo (author) / Chen, Liang (author) / Ohno, Kayo (author) / Tokuhashi, Kazuaki (author) / Sekiya, Akira (author)

    Published in:

    Atmospheric Environment ; 38 ; 725-732

    Publication date:

    2003-10-06

    Size:

    8 pages

    ISSN:

    1352-2310

    DOI:

    https://doi.org/10.1016/j.atmosenv.2003.10.019

    Type of media:

    Article (Journal)

    Type of material:

    Electronic Resource

    Language:

    English

    Keywords:

    Fluorinated ester , Gas-to-liquid partitioning , Solubility , Column-stripping method , Atmospheric lifetime

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