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Issue 5, 2005
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Hydrogen formation in the reaction of Zn+(H2O)n with HCl

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Hydrated singly charged zinc cations Zn+(H2O)n, n ≈ 6–53, were studied by Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. Black-body radiation induced dissociation results exclusively in sequential loss of individual water molecules. In the reaction of Zn+(H2O)n with gaseous HCl, Zn is oxidized and hydrogen reduced when a second HCl molecule is taken up, leading to the formation of ZnCl+(HCl)(H2O)nm cluster ions and evaporation of atomic hydrogen together with m H2O molecules. The results are compared with earlier studies of Mg+(H2O)n, for which hydrogen formation is already observed without HCl in a characteristic size region. The difference between zinc and magnesium is rationalized with the help of density functional theory calculations, which indicate a distinct difference in the thermochemistry of the reactions involved. The generally accepted hydrated electron model for hydrogen formation in Mg+(H2O)n is modified for zinc to account for the different reactivity.

Graphical abstract: Hydrogen formation in the reaction of Zn+(H2O) with HCl

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Publication details

The article was received on 08 Oct 2004, accepted on 06 Jan 2005 and first published on 18 Jan 2005

Article type: Paper
DOI: 10.1039/B415583A
Citation: Phys. Chem. Chem. Phys., 2005,7, 981-985
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    Hydrogen formation in the reaction of Zn+(H2O)n with HCl

    B. S. Fox-Beyer, Z. Sun, I. Balteanu, O. P. Balaj and M. K. Beyer, Phys. Chem. Chem. Phys., 2005, 7, 981
    DOI: 10.1039/B415583A

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