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Effect of internal excitation on the collision-induced dissociation and reactivity of Co +2

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Abstract

The kinetic energy dependence of collision-induced dissociation (CID) of dicobalt ion (Co +2 ) with He, Ar, and Xe has been investigated using guided ion-beam mass spectrometry. The change in efficiency of CID as the target gas is changed is in general agreement with previous CID studies of other systems: the cross section with Ar is ∼0.5 that with Xe, and no product ions are found with He. By varying the conditions under which the reactant ions are formed, the degree of internal excitation of the dicobalt ions is changed. The internal energies can be characterized by a Maxwell-Boltzmann distribution. We find that CID and reactions with O2 and CO are very sensitive to Co +2 internal energy. The bond-dissociation energy derived from this work is Do(Co +2 )=2.75±0.10 eV (63.4±2.3 kcal/mol). The Co +2 results are compared with a previous study of Fe +2 .

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Author notes

  1. David A. Hales

    Present address: Department of Chemistry and Biochemistry, University of California, 90024, Los Angeles, California

Authors and Affiliations

  1. Department of Chemistry, University of California, 94720, Berkeley, California

    David A. Hales

  2. Department of Chemistry, University of Utah, 84112, Salt Lake City, Utah

    P. B. Armentrout

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  1. David A. Hales
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  2. P. B. Armentrout
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Hales, D.A., Armentrout, P.B. Effect of internal excitation on the collision-induced dissociation and reactivity of Co +2 . J Clust Sci 1, 127–142 (1990). https://doi.org/10.1007/BF00703589

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