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The [Mn 2 IV (μ‐O)(μ‐PhBO 2 ) 2 ] 2+ Unit: A New Structural Model for Manganese‐Containing Metalloproteins
Author(s) -
Bossek Ursula,
Hummel Helga,
Weyhermüller Thomas,
Wieghardt Karl,
Russell Stephen,
van der Wolf Lodewijk,
Kolb Uwe
Publication year - 1996
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.199615521
Subject(s) - manganese , isostructural , extended x ray absorption fine structure , chemistry , crystallography , dication , inorganic chemistry , crystal structure , molecule , physics , absorption spectroscopy , organic chemistry , quantum mechanics
By employing boronato instead of carboxylato bridges in the dication [Mn 2 IV (μ‐O)‐(μ‐PhBO 2 ) 2 L 2 ] 2+ (L = 1,4,7‐trimethyl‐1,4,7‐triazacyclononane), a Mn 2 IVunit has been stabilized for the first time. Together with the di‐μ‐carboxylato‐μ‐oxodimanganese complexes of analogous structure, there is now an “isostructural series” available containing Mn 2 II , Mn II Mn III , Mn 2 III , Mn III Mn IV , Mn 2 IVunits. The Mn K‐edge energy of the corresponding complexes increases linearly with increasing oxidation level. This is of importance for EXAFS investigations of metalloproteins containing manganese.