Reactions of small thermalized positively charged nickel clusters with carbon monoxide were studied in a molecular beam experiment. The nickel clusters were produced in a high intensity cluster ion source and thermalized in a large helium-filled quadrupole ion guide. The clusters were size selected by a quadrupole mass spectrometer. The mass- and charge-selected nickel clusters then passed through a linear quadrupole drift tube filled with a mixture of helium buffer gas and carbon monoxide. The reaction products were then analyzed by a quadrupole mass-spectrometer. Using this technique, saturation limits for clusters with were measured and the competitive reaction channels were identified. Under certain experimental conditions carbide formation was observed in the case of the nickel tetramer, pentamer, and hexamer. The structure of the nickel carbonyl clusters is discussed within the framework of the polyhedral skeletal electron pair theory. The cluster growth may be explained by a pentagonal sequence of structures for capping of the pentagonal bipyramid to buildup an icosahedron at and further capping of this icosahedron to form a double icosahedron at
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1 September 1997
Research Article|
September 01 1997
Reactions of size-selected positively charged nickel clusters with carbon monoxide in molecular beams
Štefan Vajda;
Štefan Vajda
Institut für Experimentalphysik, Freie Universität Berlin, Arnimalee 14, D-14195 Berlin, Germany
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Sebastian Wolf;
Sebastian Wolf
Institut für Experimentalphysik, Freie Universität Berlin, Arnimalee 14, D-14195 Berlin, Germany
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Thomas Leisner;
Thomas Leisner
Institut für Experimentalphysik, Freie Universität Berlin, Arnimalee 14, D-14195 Berlin, Germany
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Ulrike Busolt;
Ulrike Busolt
Institut für Experimentalphysik, Freie Universität Berlin, Arnimalee 14, D-14195 Berlin, Germany
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Ludger H. Wöste;
Ludger H. Wöste
Institut für Experimentalphysik, Freie Universität Berlin, Arnimalee 14, D-14195 Berlin, Germany
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David J. Wales
David J. Wales
University Chemical Laboratories, Lensfield Rd., Cambridge CB2 1EW, United Kingdom
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J. Chem. Phys. 107, 3492–3497 (1997)
Article history
Received:
January 16 1997
Accepted:
May 22 1997
Citation
Štefan Vajda, Sebastian Wolf, Thomas Leisner, Ulrike Busolt, Ludger H. Wöste, David J. Wales; Reactions of size-selected positively charged nickel clusters with carbon monoxide in molecular beams. J. Chem. Phys. 1 September 1997; 107 (9): 3492–3497. https://doi.org/10.1063/1.474688
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