Surface Collisions of the Acetonitrile Molecular Ion: Evidence for Isomerization of CD3CN center dot+ to the Ketenimine Cation CD2=C=ND center dot+

0181592 - UFCH-W 20030018 RIV NL eng J - Journal Article
Mair, C. - Roithová, Jana - Fedor, J. - Lezius, M. - Herman, Zdeněk - Märk, T. D.
Surface Collisions of the Acetonitrile Molecular Ion: Evidence for Isomerization of CD3CN center dot+ to the Ketenimine Cation CD2=C=ND center dot+.
International Journal of Mass Spectrometry. 223-224, 1/3 (2003), s. 279-290. ISSN 1387-3806. E-ISSN 1873-2798
R&D Projects: GA ČR GA203/00/0632
Institutional research plan: CEZ:AV0Z4040901
Keywords : acetonitrile cation * surface reactions * isomerization
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.361, year: 2003

Reactions induced by the impact of acetonitrile and deuterated acetonitrile molecular ions on a hydrocarbon-covered stainless steel surface were investigated using a recently constructed tandem mass spectrometer (BESTOF). Mass spectra of product ions formed were recorded for projectile collision energies in the range of about 5-70 eV. Both, simple dissociations of the projectile ion and chemical reactions involving H-atom transfer from the surface material (followed by subsequent dissociation of the protonated projectile ion formed) were observed. In particular, formation of CD2H+ and CD3+ via dissociation of the surface-protonated deuterated acetonitrile ion CD3CNH+ and the collision energy dependence of their relative abundance indicate substantial degree of isomerization of the acetonitrile molecular radical cation CD3CN.+ to the ketenimine ion CD2=C=ND.+.
Permanent Link: http://hdl.handle.net/11104/0078135