Synthesis and Structure of Ethynyl Isocyanide

Authors

  • Dipl.-Chem. Michael Krüger,

    1. Institut für Physikalische Chemie, Abteilung Chemische Physik der Universität, Ludewig-Meyn-Strasse 8, W-2300 Kiel 1 (FRG)
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  • Prof. Dr. Helmut Dreizler,

    Corresponding author
    1. Institut für Physikalische Chemie, Abteilung Chemische Physik der Universität, Ludewig-Meyn-Strasse 8, W-2300 Kiel 1 (FRG)
    • Institut für Physikalische Chemie, Abteilung Chemische Physik der Universität, Ludewig-Meyn-Strasse 8, W-2300 Kiel 1 (FRG)
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  • Dipl.-Chem. Dagmar Preugschat,

    1. Institut für Anorganische und Analytische Chemie der Freien Universität, Fabeckstrasse 34–36, W-1000 Berlin 33 (FRG)
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  • Priv.-Doz. Dr. Dieter Lentz

    Corresponding author
    1. Institut für Anorganische und Analytische Chemie der Freien Universität, Fabeckstrasse 34–36, W-1000 Berlin 33 (FRG)
    • Institut für Anorganische und Analytische Chemie der Freien Universität, Fabeckstrasse 34–36, W-1000 Berlin 33 (FRG)
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  • This work was supported by the Fonds der Chemischen Industrie, the Deutsche Forschungsgemeinschaft, the Land Schleswig-Holstein, and the Graduiertenkolleg “Synthesis and Structural Elucidation of Low-Molecular-Weight Compounds” of the Freie Universität Berlin and the Technische Universität Berlin. We thank Prof. Dr. H. Mäder, Dr. W. Stahl, and Dr. N. Heineking, Kiel, for many encouraging discussions.

Abstract

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Unexpectedly stable is ethynyl isocyanide 1, the parent compound of the hither-to unknown alkynyl isocyanides. It is storable at −196°C for several weeks and at room temperature for several days in the gas phase. Compound 1 is obtained by flash vacuum pyrolysis of the chromium complex 2. The microwave data of 1 described in this communication enabled it to be detected (after submission of this paper) in interstellar space by radioastronomy where other nitrogen-containing isomeric pairs consisting of uncharged closed-shell molecules, as well as its isomer HC[TRIPLE BOND]C[BOND]N, abound.

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