Advertisement

Aryl Calcium Compounds: Syntheses, Structures, Physical Properties, and Chemical Behavior

Authors

  • Matthias Westerhausen,

    1. Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany, Fax: (+49) 3641-948-102
    Search for more papers by this author
  • Martin Gärtner,

    1. Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany, Fax: (+49) 3641-948-102
    Search for more papers by this author
  • Reinald Fischer,

    1. Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany, Fax: (+49) 3641-948-102
    Search for more papers by this author
  • Jens Langer

    1. Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany, Fax: (+49) 3641-948-102
    Search for more papers by this author

Abstract

Organocalcium chemistry is still in its infancy. The direct synthesis of activated calcium and (substituted) iodobenzenes allows for the large-scale and high-yield synthesis of aryl calcium iodides. The influence of the substitution patterns of the phenyl group, halogen atom, and solvent is discussed. Aryl calcium iodides show a Schlenk equilibrium that enables the isolation of diaryl calcium derivatives. Owing to the high reactivity of aryl calcium halides, low temperatures have to be maintained throughout the preparative procedures in order to avoid side reactions. A decrease of reactivity and, hence, an enhanced stability at higher temperatures can be achieved by shielding of the calcium atom by increasing the coordination number of the metal center or by substitution of the iodide anion by bulky groups.

Ancillary