کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1192503 1492360 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dissociative electron attachment to nitromethane
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Dissociative electron attachment to nitromethane
چکیده انگلیسی

Dissociative electron attachment (DEA) measurements to nitromethane, CH3NO2, in the gas phase have been revisited by making use of a high mass-resolution sector field instrument. Anion efficiency curves for 16 negatively charged fragments have been measured in the electron energy region from about 0 to 16 eV with an energy resolution of ∼1 eV. Eight new anions have been detected, CH2NO2−, CHNO2−, CH2NO−, H2NO−, CH3−, CH2−, CH− and H−. The five most dominant product anions are NO2−, O−, OH−, CN− and CNO−, all of them featuring two high-energy resonances at about 5 eV and 10 eV. Formation of CH2NO2− at low electron energies has been explained in terms of DEA to highly vibrationally excited molecules. The standard enthalpy of formation of CH2NO2− and H−, CH2− and NO− radicals have been estimated as ΔfHg°(CH2NO2−) = –1.71 eV, ΔfHg°(H−) = 2.09 eV, ΔfHg°(CH2−) = 3.5 eV and ΔfHg°(NO−) = –1.93 eV, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 271, Issues 1–3, 1 April 2008, Pages 15–21
نویسندگان
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