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Slow Magnetic Relaxation in Mononuclear Octahedral Manganese(III) Complexes with Dibenzoylmethanide Ligands
Author(s) -
Chen Lei,
Wang Jing,
Liu YuanZhong,
Song You,
Chen XueTai,
Zhang YiQuan,
Xue ZiLing
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402964
Subject(s) - chemistry , magnetic susceptibility , magnetization , crystallography , octahedron , octahedral molecular geometry , manganese , magnetic anisotropy , relaxation (psychology) , ligand (biochemistry) , ab initio quantum chemistry methods , ion , ab initio , molecule , magnetic field , crystal structure , psychology , social psychology , biochemistry , physics , receptor , organic chemistry , quantum mechanics
The structural characterization and magnetic studies of three mononuclear Mn III complexes based on the dibenzoylmethanido (dbm – ) ligand, Mn(dbm) 3 ( 1 ) and [Mn(dbm) 2 (L) 2 ](ClO 4 ) (L = dimethyl sulfoxide, 2 ; L = pyridine, 3 ), are reported. The Mn III ions are in an axially elongated octahedral coordination geometry. The axial zero‐field‐splitting parameters D , ranging from –3.42 to –4.52 cm –1 for the three complexes, were obtained by fitting magnetic‐susceptibility and magnetization data. Ab initio calculations also show the axial magnetic anisotropy in the molecules of 1 – 3 . With an applied dc field, the ac susceptibility measurements reveal slow magnetic relaxation in 1 – 3 . The possible relationship between the structures and the magnetic properties in these complexes are discussed.