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7Li Residual Quadrupolar Couplings as a Powerful Tool To Identify the Degree of Organolithium Aggregation

Authors

  • Ann-Christin Pöppler,

    1. Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
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  • Helena Keil,

    1. Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
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  • Prof. Dr. Dietmar Stalke,

    Corresponding author
    1. Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
    • Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
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  • Dr. Michael John

    Corresponding author
    1. Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
    • Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
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  • We kindly acknowledge funding from the DFG Priority Programme 1178, the DNRF funded Centre of Materials Crystallography, and the doctoral programme Catalysis for Sustainable Synthesis, provided by the Land Niedersachsen. We appreciate chemical donations from CHEMETALL.

Abstract

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Lithium in the gel: The NMR spectroscopic properties of common organolithium and lithium amide reagents are investigated in the anisotropic environment of a stretched polystyrene (PS) gel. PS is stable towards reactive organometallic compounds and can be used at low temperatures. The residual quadrupolar couplings (RQCs) from a single 7Li NMR spectrum can distinguish between high (hexamer, tetramer) and low (dimer, monomer) aggregation states (see scheme).

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