Gas phase ion molecule chemistry of tetracarbonyl (η5-cyclopentadienyl) vanadium by Fourier transform ion cyclotron resonance
Identifieur interne : 001174 ( Istex/Curation ); précédent : 001173; suivant : 001175Gas phase ion molecule chemistry of tetracarbonyl (η5-cyclopentadienyl) vanadium by Fourier transform ion cyclotron resonance
Auteurs : Sandra M. Taylor [Canada] ; Melvin B. Comisarow [Canada]Source :
- International Journal of Mass Spectrometry [ 1387-3806 ] ; 1998.
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Abstract
The kinetics of the reactions between the CpV(CO)4 molecule and its fragment cations and anions have been examined using Fourier transform ion cyclotron resonance (FTICR) techniques. With 25 eV electron impact ionization the fragment cations V+ and CpV(CO)n=0–4+ react principally by charge exchange or by condensation with the parent neutral molecule. Rate constants for these pathways have been determined along with kinetic evidence for the existence of excited state cations. Some of the product cations show unexpected stability despite their large formal electron deficiency. Exchange of carbonyl ligands was also observed. Under 2.5 eV electron impact, only two anions are produced: CpV(CO)n=2,3−, both of which are unreactive with the parent neutral.
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DOI: 10.1016/S1387-3806(98)14231-8
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<front><div type="abstract" xml:lang="en">The kinetics of the reactions between the CpV(CO)4 molecule and its fragment cations and anions have been examined using Fourier transform ion cyclotron resonance (FTICR) techniques. With 25 eV electron impact ionization the fragment cations V+ and CpV(CO)n=0–4+ react principally by charge exchange or by condensation with the parent neutral molecule. Rate constants for these pathways have been determined along with kinetic evidence for the existence of excited state cations. Some of the product cations show unexpected stability despite their large formal electron deficiency. Exchange of carbonyl ligands was also observed. Under 2.5 eV electron impact, only two anions are produced: CpV(CO)n=2,3−, both of which are unreactive with the parent neutral.</div>
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