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A Very‐High‐Spin Molecule: Preparation, Characterization and Magnetic Properties of an Fe III –Gd III Complex with an S = 12/2 Ground State
Author(s) -
Costes JeanPierre,
Dupuis Arnaud,
Laurent JeanPierre
Publication year - 1998
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/(sici)1099-0682(199810)1998:10<1543::aid-ejic1543>3.0.co;2-t
Subject(s) - chemistry , characterization (materials science) , ground state , molecule , spin (aerodynamics) , spin states , nanotechnology , inorganic chemistry , atomic physics , organic chemistry , aerospace engineering , physics , materials science , engineering
The tripodal ligand tris[4‐(2‐hydroxy‐3‐methoxyphenyl)‐3‐aza‐3‐buten]amine (H 3 vantren) offers two coordination sites, an inner N 4 O 3 one and an outer O 6 one. Therefore, it can successively encapsulate two different metal ions, a 3d(III) ion in the N 4 O 3 site, and a 4f(III) ion in the O 6 site. This general route to homo‐ and heterodinuclear complexes has been exploited for the preparation of the vantrenFeGd(NO 3 ) 3 · 2 H 2 O complex ( 2 ), featuring a high‐spin iron centre. This compound has been characterized by chemical analysis and mass spectrometry (FAB + ). Its magnetic properties have been investigated and show that the (Fe,Gd) pair ( 2 ) exhibits a ferromagnetic interaction of low intensity [ J = 0.50(5) cm –1 ]. The resulting S = 12/2 ground state is, most probably, the highest spin ground state that can be expected for a dinuclear complex.