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Access to the Bis‐benzene Cobalt(I) Sandwich Cation and its Derivatives: Synthons for a “Naked” Cobalt(I) Source?
Author(s) -
Meier Stefan C.,
Holz Albina,
Kulenkampff Jan,
Schmidt Alexei,
Kratzert Daniel,
Himmel Daniel,
Schmitz Dominik,
Scheidt ErnstWilhelm,
Scherer Wolfgang,
Bülow Christine,
Timm Martin,
Lindblad Rebecka,
Akin Scott T.,
ZamudioBayer Vicente,
von Issendorff Bernd,
Duncan Michael A.,
Lau J. Tobias,
Krossing Ingo
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201803108
Subject(s) - cobalt , synthon , benzene , chemistry , solubility , salt (chemistry) , solvent , valence (chemistry) , crystallography , inorganic chemistry , stereochemistry , organic chemistry
Abstract The synthesis and structural characterization of the hitherto unknown parent Co(bz) 2 + (bz=benzene) complex and several of its derivatives are described. Their synthesis starts either from a CoCO 5 + salt, or directly from Co 2 (CO) 8 and a Ag + salt. Stability and solubility of these complexes was achieved by using the weakly coordinating anions (WCAs) [Al(OR F ) 4 ] − and [F{Al(OR F ) 3 } 2 ] − {R F =C(CF 3 ) 3 } and the solvent ortho ‐difluorobenzene ( o ‐DFB). The magnetic properties of Co(bz) 2 + were measured and compared in the condensed and gas phases. The weakly bound Co( o ‐dfb) 2 + salts are of particular interest for the preparation of further Co I salts, for example, the structurally characterized low‐coordinate 12 valence electron Co(P t Bu 3 ) 2 + and Co(NHC) 2 + salts.