Premium
Aryl Calcium Compounds: Syntheses, Structures, Physical Properties, and Chemical Behavior
Author(s) -
Westerhausen Matthias,
Gärtner Martin,
Fischer Reinald,
Langer Jens
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200604192
Subject(s) - aryl , chemistry , calcium , reactivity (psychology) , halogen , calcium compounds , solvent , iodide , halide , chemical stability , yield (engineering) , calcium salts , inorganic chemistry , combinatorial chemistry , organic chemistry , materials science , alkyl , medicine , alternative medicine , pathology , metallurgy
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.