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Nine-Atom Tin-Bismuth Clusters: Mimicking Excess Electrons by Element Substitution

Authors

  • Dipl.-Ing. Sven Heiles,

    1. Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 18 and 20, 64287 Darmstadt, (Germany)
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  • Dr. Kathrin Hofmann,

    1. Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 18 and 20, 64287 Darmstadt, (Germany)
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  • Prof. Dr. Roy L. Johnston,

    1. School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)
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  • Prof. Dr. Rolf Schäfer

    Corresponding author
    1. Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 18 and 20, 64287 Darmstadt, (Germany)
    • Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 18 and 20, 64287 Darmstadt, (Germany)
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Abstract

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Avoiding negative charge: Combined experimental and theoretical evidence shows that neutral, nine-atom tin-bismuth clusters adopt structures of closely related tin (poly)anions (see figure; Sn gray, Bi blue). These clusters exhibit similar bonding arrangements as known from Zintl ions. Hence, element substitution can be used to eliminate the negative charge without affecting the bonding or structural motif.

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