The gas phase reactivity of XeF+ towards acetylene was investigated by triple quadrupole mass spectrometry. XeF+ promotes both F+ and Xe+ transfer to acetylene, yielding C2H2F+ and C2H2Xe+, respectively. The C2H2F+ ions formed were probed by low-energy collisionaly activated dissociation mass spectrometry and characterized as CH2=CF+, namely the isomer identified as the most stable by previous theoretical studies. The 1-fluorovinyl cation reacts in the gas phase with typical nucleophiles (CH3COCH3, CH3CN, CH3OH, C2H4) as bronsted acid and/or as a fluorinating agent, depending on the thermochemistry of the processes involved.
Gas-Phase Fluorination of Acetylene by XeF+: Formation, Structure and Reactivity of C2H2F+ Isomeric Ions / Cacace, Fulvio; Attina', M.; Cartoni, Antonella; Pepi, Federico. - In: CHEMICAL PHYSICS LETTERS. - ISSN 0009-2614. - STAMPA. - 339:(2001), pp. 71-76. [10.1016/S0009-2614(01)00248-2]
Gas-Phase Fluorination of Acetylene by XeF+: Formation, Structure and Reactivity of C2H2F+ Isomeric Ions
CACACE, Fulvio;CARTONI, Antonella;PEPI, Federico
2001
Abstract
The gas phase reactivity of XeF+ towards acetylene was investigated by triple quadrupole mass spectrometry. XeF+ promotes both F+ and Xe+ transfer to acetylene, yielding C2H2F+ and C2H2Xe+, respectively. The C2H2F+ ions formed were probed by low-energy collisionaly activated dissociation mass spectrometry and characterized as CH2=CF+, namely the isomer identified as the most stable by previous theoretical studies. The 1-fluorovinyl cation reacts in the gas phase with typical nucleophiles (CH3COCH3, CH3CN, CH3OH, C2H4) as bronsted acid and/or as a fluorinating agent, depending on the thermochemistry of the processes involved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
