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Control of Exchange Interactions in Trinuclear Complexes Based on Orthogonal Magnetic Orbitals
Author(s) -
Weber Birgit,
Obel Jaroslava,
Lorenz Lucia R.,
Bauer Wolfgang,
Carrella Luca,
Rentschler Eva
Publication year - 2009
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.200900847
Subject(s) - chemistry , copper , atomic orbital , crystallography , magnetic susceptibility , schiff base , ligand (biochemistry) , stereochemistry , organic chemistry , quantum mechanics , electron , biochemistry , receptor , physics
The reaction of copper(II) acetate with the tetradentate Schiff base like ligand H 4 L {( E , E )‐[{diethyl 2,2′‐[4,5‐dihydroxy‐1,2‐phenylenebis(iminomethylidyne)]bis(3‐oxobutanoate)}] leads to the formation of the square planar N 2 O 2 coordinated complex [H 2 CuL]. Reaction of two equivalents of this complex with copper(II) acetylacetonato or vanadyl(IV) acetylacetonato yields the trinuclear complexes [V(O)Cu 2 L 2 ][N( n Bu) 4 ] 2 · 2MeOH ( 1 ) and [Cu 3 L 2 ][N( n Bu) 4 ] 2 · 2DMF ( 2 ). Both complexes were characterised by using magnetic measurements and X‐ray crystallography. Special attention was given to the spin‐exchange coupling through the bridging phenylene ring. The principle of strict orthogonality of the magnetic orbitals can be applied to explain the results of the susceptibility measurements. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)