Cyanamide (NH2CN) is a molecule relevant for interstellar chemistry and the chemical evolution of life. In the present investigation, dissociative electron attachment to NH2CN has been studied in a crossed electron–molecular beams experiment in the electron energy range from about 0 eV to 14 eV. The following anionic species were detected: NHCN−, NCN−, CN−, NH2−, NH−, and CH2−. The anion formation proceeds within two broad electron energy regions, one between about 0.5 and 4.5 eV and a second between 4.5 and 12 eV. A discussion of possible reaction channels for all measured negative ions is provided. The experimental results are compared with calculations of the thermochemical thresholds of the anions observed. For the dehydrogenated parent anion, we explain the deviation between the experimental appearance energy of the anion with the calculated corresponding reaction threshold by electron attachment to the isomeric form of NH2CN—carbodiimide.
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21 January 2015
Research Article|
January 15 2015
Low energy electron attachment to cyanamide (NH2CN) Available to Purchase
Katrin Tanzer;
Katrin Tanzer
1Institut für Ionenphysik und Angewandte Physik,
Leopold Franzens Universität Innsbruck
, Technikerstr. 25, 6020 Innsbruck, Austria
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Andrzej Pelc;
Andrzej Pelc
a)
2Mass Spectrometry Department, Institute of Physics,
Marie Curie-Sklodowska University
, Pl. M. C.-Sklodowskiej 1, 20-031 Lublin, Poland
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Stefan E. Huber;
Stefan E. Huber
1Institut für Ionenphysik und Angewandte Physik,
Leopold Franzens Universität Innsbruck
, Technikerstr. 25, 6020 Innsbruck, Austria
3Lehrstuhl für Theoretische Chemie,
Technische Universität München
, Lichtenbergstr. 4, 85747 Garching, Germany
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Z. Czupyt;
Z. Czupyt
4
Ion Microprobe Facility Micro-area Analysis Laboratory
, Polish Geological Institute–National Research Institute, Rakowiecka 4, 00-975 Warszawa, Poland
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Stephan Denifl
Stephan Denifl
a)
1Institut für Ionenphysik und Angewandte Physik,
Leopold Franzens Universität Innsbruck
, Technikerstr. 25, 6020 Innsbruck, Austria
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Katrin Tanzer
1
Andrzej Pelc
2,a)
Stefan E. Huber
1,3
Z. Czupyt
4
Stephan Denifl
1,a)
1Institut für Ionenphysik und Angewandte Physik,
Leopold Franzens Universität Innsbruck
, Technikerstr. 25, 6020 Innsbruck, Austria
2Mass Spectrometry Department, Institute of Physics,
Marie Curie-Sklodowska University
, Pl. M. C.-Sklodowskiej 1, 20-031 Lublin, Poland
3Lehrstuhl für Theoretische Chemie,
Technische Universität München
, Lichtenbergstr. 4, 85747 Garching, Germany
4
Ion Microprobe Facility Micro-area Analysis Laboratory
, Polish Geological Institute–National Research Institute, Rakowiecka 4, 00-975 Warszawa, Poland
a)
Electronic addresses: [email protected] and [email protected]
J. Chem. Phys. 142, 034301 (2015)
Article history
Received:
October 01 2014
Accepted:
December 19 2014
Citation
Katrin Tanzer, Andrzej Pelc, Stefan E. Huber, Z. Czupyt, Stephan Denifl; Low energy electron attachment to cyanamide (NH2CN). J. Chem. Phys. 21 January 2015; 142 (3): 034301. https://doi.org/10.1063/1.4905500
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