* Corresponding authors
a Department of Physics, University of Trento, Via Sommarive 14, Trento, Italy
E-mail: ascenzi@science.unitn.it
b Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, Prague 2, Czech Republic
E-mail: roithova@natur.cuni.cz
c Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, Prague 6, Czech Republic
d University College London, Department of Chemistry, 20 Gordon Street, London, United Kingdom
E-mail: s.d.price@ucl.ac.uk
Using doubly ionized acetylene as a superelectrophilic reagent, the new rare-gas compounds HCCAr 2+ and HCCKr 2+ have been prepared for the first time in hyperthermal collisions of mass-selected C2H22+ with neutral rare gases ( Rg ). However, electron transfer from the rare gas to the acetylene dication as well as proton transfer from C2H22+ to the rare gas efficiently compete with formation of HCCRg 2+ . The computational investigations show that the formation of HCCRg 2+ from acetylene dication is endothermic with Rg = He , Ne , Ar and Kr and only weakly exothermic with Xe . These energetic factors, as well as the pronounced competition with the other reactive channels help to explain why HCCRg 2+ is only observed with Rg = Ar and Kr .
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Please wait while we load your content... Something went wrong. Try again? Article informationPhys. Chem. Chem. Phys., 2008,10, 7121-7128
D. Ascenzi, P. Tosi, J. Roithová, C. L. Ricketts, D. Schröder, J. F. Lockyear, M. A. Parkes and S. D. Price, Phys. Chem. Chem. Phys., 2008, 10, 7121 DOI: 10.1039/B810398D
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