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Mixed‐Valence, Tetranuclear Iron Chelate Complexes as Endoreceptors: Charge Compensation Through Inclusion of Cations
Author(s) -
Saalfrank Rolf W.,
Burak Roman,
Breit Alexandra,
Stalke Dietmar,
HerbstIrmer Regine,
Daub Jörg,
Porsch Michael,
Bill Eckhard,
Müther Markus,
Trautwein Alfred X.
Publication year - 1994
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199416211
Subject(s) - valence (chemistry) , crystallography , chemistry , chelation , redox , ion , stereochemistry , inorganic chemistry , organic chemistry
In a simple one‐pot reaction the host‐guest compounds 1 (white spheres Fe III ; black = Fe II ; gray = NH 4 + ; angled rods = 2 : R = Me, Et) are accessible in gram quantities by self‐assembly. They are the only fully characterized redox isomers whose cyclic voltammograms display four quasi‐reversible waves and whose mixed‐valent character has been established by Mössbauer spectra. The endohedral complexation of one NH 4 +ion in 1 has been confirmed by X‐ray crystallography.