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 C2O3+ intermediate. The increase of internal energy displaces the observed reactivity towards an endothermic reaction path that involves only CO2 and represents an indirect route to the dissociation of carbon dioxide.
Isotope exchange in ionized CO2/CO mixtures: the role of asymmetrical C2O3+ ions / DE PETRIS, Giulia; Cartoni, Antonella; M., Rosi; Troiani, Anna; G., Angelini; O., Ursini. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - STAMPA. - 10:24(2004), pp. 6411-6421. [10.1002/chem.200400483]
Isotope exchange in ionized CO2/CO mixtures: the role of asymmetrical C2O3+ ions
DE PETRIS, GIULIA;CARTONI, Antonella;TROIANI, Anna;
2004
Abstract
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 C2O3+ intermediate. The increase of internal energy displaces the observed reactivity towards an endothermic reaction path that involves only CO2 and represents an indirect route to the dissociation of carbon dioxide.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
