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Synthesis, Structure and Magnetic Properties of a Dinuclear Manganese( II ) Complex with One μ‐Aqua and Two μ‐Carboxylato Bridges
Author(s) -
Caneschi Andrea,
Ferraro Fabrizio,
Gatteschi Dante,
Melandri Maria Chiara,
Rey Paul,
Sessoli Roberta
Publication year - 1989
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.198913651
Subject(s) - manganese , chemistry , molecule , crystallography , ion , stereochemistry , oxygen , organic chemistry
A water molecule between two complexed Mn II centers —that is the salient feature of the title compound 1 (L = dihydroimidazole unit with NO and NO · functions). A μ‐bridge similar to that in 1 might be present in many natural proteins, for example in the oxygen‐transporting protein hemerythrin. Simple Mn II model complexes containing O 2⊖ and OH ⊖ bridges were previously unknown. The d 5 ions in this series of complexes are antiferromagnetically coupled; the coupling constants decrease by about an order of magnitude for each step on going from O 2⊖ to OH ⊖ to H 2 O.