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- W2034172167 abstract "Abstract The electron impact ionisation of 2-heptanone between 13 and 78 eV is studied using mass spectrometry. CH3C(O)CH2CH2CH2CH2CH3+ and fragment ions are produced with a total cross-section of 5 × 10−16 cm2 towards 50 eV. Two ions, identified as CH3CO+ (43 amu) and CH3C(OH)CH2+ (58 amu), contribute to about 60% of the total cross-section for electron energies above the ionisation threshold. The detected ions are identified using ab initio calculations. For E = 14 eV, the ion of 58 amu is the most abundant followed by an ion of 59 amu identified as being CH3C(OH)CH3+; they result from a bond cleavage with one or two H atom rearrangements. For E ≥ 48 eV, the ion of 43 amu is the most abundant; it results from an α-cleavage reaction in the molecular ion." @default.
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- W2034172167 date "2005-01-01" @default.
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- W2034172167 title "Electron impact ionisation cross-sections of 2-heptanone" @default.
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- W2034172167 doi "https://doi.org/10.1016/j.ijms.2004.10.017" @default.
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