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Synthese und Struktur eines zweikernigen Gadolinium(III)‐Komplexes: Magnetische Austauschwechselwirkungen in alkoxyverbrückten Komplexen der Lanthanoiden
Author(s) -
Plass Winfried,
Fries Guido
Publication year - 1997
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19976230804
Subject(s) - gadolinium , chemistry , monoclinic crystal system , crystallography , alkoxy group , lanthanide , ligand (biochemistry) , schiff base , ethylamine , crystal structure , ion , alkyl , receptor , organic chemistry , biochemistry
Synthesis and Structure of a Binuclear Gadolinium(III) Complex: Magnetic Exchange Interactions in Alkoxy Bridged Lanthanide Complexes The Schiff Base ligand N ‐salicylidene‐2‐(bis‐(2‐hydroxyethyl)amino)ethylamine (H 3 sabhea) reacts with Gd(NO 3 ) 3 · 6 H 2 O in methanol solution to yield the alkoxy bridged binuclear gadolinium(III) complex [{Gd(Hsabhea)(NO 3 )} 2 ] · 2MeOH ( 1 ). 1 crystallizes in the monoclinic space group P 2 1 / c with a = 1014.8(2), b = 2059.2(4), c = 867.5(2) pm, β = 106.72(2)°, and Z = 2. The two gadolinium atoms are bridged by two alkoxide oxygen atoms with angles of 107.60(11)° at the oxygen bridgeheads and a GdGd separation of 376.43(7) pm. A variable‐temperature magnetic susceptibility study (2 to 280 K) of 1 revealed an antiferromagnetic coupling between the Gd(III) ions with J = −0.198 cm −1 (g = 1.975).