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Photodissociation spectroscopy of the [OCS·C2H2]+ cluster ion.
- Source :
-
Journal of Chemical Physics . 6/15/1990, Vol. 92 Issue 12, p7365. 8p. - Publication Year :
- 1990
-
Abstract
- The potential-energy surface features involved in the [OCS+C2H2]+ reaction system allow a metastable enroute to reaction to be trapped. The absolute photodissociation spectrum of this trapped metastable [OCS·C2H2]+ cluster ion has been measured in the wavelength region between 375 and 735 nm using a coaxial-laser–triple-quadrupole ion-beam apparatus. The photodissociation spectrum consists of at least three broad overlapping profiles, and OCS+, C2H+2, and C2H2S+ are the observed ionic photoproducts. The spectrum is interpreted in terms of transitions to excited charge-transfer states which are repulsive and to a dissociative transition which is localized on the perturbed OCS+ moiety. The C2H+2 fragment becomes detectable within sensitivity limits at 1.69 eV, yielding an upper limit estimate of 1.46 eV (+0.15/-0.23 eV) for the cluster bond dissociation energy. The C2H2S+ product is only observable at photon energies greater than 2.74 eV and is considered to be the product of a photoinitiated intracluster ion–molecule reaction. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POTENTIAL energy surfaces
*CHEMICAL reactions
*PHOTODISSOCIATION
*IONS
Subjects
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 92
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 7665289
- Full Text :
- https://doi.org/10.1063/1.458222