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  • Anion···π interactions and metastability: Structural transformations in a silver–pyrazine network

    Author(s)
    Gee, William J
    Robertson, Karen
    Skelton, Jonathan M
    Griffith University Author(s)
    Gee, William J.
    Year published
    2017
    Metadata
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    Abstract
    Structural evidence of anion···π interactions influencing single-crystal-to-single-crystal (SCSC) transformations is demonstrated herein with a metastable silver–pyrazine system. A cascade of SCSC transformations driven by changes to anion···π stabilisation sees two metastable species convert to a ground-state form. This constitutes one of the most dramatic chemical effects yet attributed to anion···π interactions. Metastable networks [Ag(µ-NO2)(pyz)] (1, 2) are composed of dimerised (1) and delaminated (2) AgNO2/pyrazine, which convert to the ground-state [Ag(κ2-NO2)(pyz)] form 3 with 3D connectivity. The metastable phases ...
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    Structural evidence of anion···π interactions influencing single-crystal-to-single-crystal (SCSC) transformations is demonstrated herein with a metastable silver–pyrazine system. A cascade of SCSC transformations driven by changes to anion···π stabilisation sees two metastable species convert to a ground-state form. This constitutes one of the most dramatic chemical effects yet attributed to anion···π interactions. Metastable networks [Ag(µ-NO2)(pyz)] (1, 2) are composed of dimerised (1) and delaminated (2) AgNO2/pyrazine, which convert to the ground-state [Ag(κ2-NO2)(pyz)] form 3 with 3D connectivity. The metastable phases show responsiveness to solvent vapour and temperature. This work shows how anion···π interactions influence solid-state structure with support from computational modelling and highlights how metastable materials may harness anion···π interactions to deliver large structural and property changes.
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    Journal Title
    European Journal of Inorganic Chemistry
    Volume
    2017
    Issue
    19
    DOI
    https://doi.org/10.1002/ejic.201700505
    Subject
    Inorganic chemistry
    Other chemical sciences
    Science & Technology
    Physical Sciences
    Chemistry, Inorganic & Nuclear
    Chemistry
    Anion center dot center dot center dot pi interactions
    Publication URI
    http://hdl.handle.net/10072/409010
    Collection
    • Journal articles

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