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Cover Picture: Direct CH Metalation with Chromium(II) and Iron(II): Transition‐Metal Host / Benzenediide Guest Magnetic Inverse‐Crown Complexes (Angew. Chem. Int. Ed. 18/2009)
Author(s) -
Alborés Pablo,
Carrella Luca M.,
Clegg William,
GarcíaÁlvarez Pablo,
Kennedy Alan R.,
Klett Jan,
Mulvey Robert E.,
Rentschler Eva,
Russo Luca
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200990089
Subject(s) - metalation , chromium , deprotonation , chemistry , reactivity (psychology) , cover (algebra) , inorganic chemistry , crystallography , stereochemistry , organic chemistry , ion , engineering , medicine , alternative medicine , pathology , mechanical engineering
Chromation and ferration are the latest additions to the concept of alkali‐metal‐mediated metalation, as described by J. Klett, R. E. Mulvey, and co‐workers in their Communication on page 3317 ff. While the more electropositive sodium is essential for the reaction, it is the less electropositive chromium or iron that actually performs deprotonation of benzene. This novel reactivity can be likened to a game of chess in which the queen (Na) holds the king in check, while the knight (Cr, Fe) scores checkm(etal)ate.