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Isotope Exchange in Ionised CO 2 /CO M ixtures: The Role of Asymmetrical C 2 O 3 + Ions
Author(s) -
de Petris Giulia,
Cartoni Antonella,
Rosi Marzio,
Troiani Anna,
Angelini Giancarlo,
Ursini Ornella
Publication year - 2004
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200400483
Subject(s) - chemistry , carbon monoxide , dissociation (chemistry) , endothermic process , isotope , carbon dioxide , reactivity (psychology) , ion , ion exchange , kinetic isotope effect , compounds of carbon , deuterium , isotopes of carbon , analytical chemistry (journal) , inorganic chemistry , radiochemistry , chemical reaction , adsorption , environmental chemistry , atomic physics , catalysis , nuclear physics , organic chemistry , physics , medicine , alternative medicine , pathology , total organic carbon
A hitherto unknown, atmospherically relevant, isotope‐exchange reaction was studied in ionised gaseous mixtures containing carbon dioxide and monoxide. The mechanism of the O exchange, proceeding over a double‐minimum potential‐energy surface, was positively established by mass spectrometric and theoretical methods that also allowed the identification and characterisation of the C 2 O 3 + intermediate. The increase of internal energy displaces the observed reactivity towards an endothermic reaction path that involves only CO 2 and represents an indirect route to the dissociation of carbon dioxide.