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The yield decreased with the decrease of the concentration of 2 presumably due to the decrease of radical trapping efficiency: 74% (0.05 M), 46% (0.025 M), 27% (0.01 M).
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Preliminary DFT calculations indicate that the ionization energy of the carbamate is 8.44 eV, whereas that of the radical is 6.06 eV.
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