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Structure and magnetic properties of homobinuclear gadolinium (III) complex of isonicotinoyl hydrazone
Author(s) -
RuoHua Zhang,
HongMei Wang,
DaiZheng Liao,
JingTang Chen,
HongGen Wang,
XingKan Yao
Publication year - 1996
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19960140605
Subject(s) - chemistry , monoclinic crystal system , crystallography , gadolinium , crystal structure , molecule , antiferromagnetism , ion , magnetic susceptibility , hydrazone , inorganic chemistry , stereochemistry , organic chemistry , physics , condensed matter physics
The crystal structure of [Gd 2 (μ‐L) 3 (H 2 O) 2 ]1.5(NO 3 )1.5 (OH)5H 2 O (where L is union of N, N ‐Diisonicotinoyl‐2‐hydroxy‐5‐methyl‐isophthalaldehyde dihydrazone) has been determined by X‐ray diffraction method. The complex crystallizes in the monoclinic system, space group P 2 1 /c with a =1.6654(3), b =1.6904(3), c =2.8039(6) nm, β=91.30(3), final R factor is 6.3%. The structure consists of [Gd 2 (μ‐L) 3 (H 2 O) 2 ] 3+ cation, one and a half nitrate and 1.5 hydroxyl anions and five water molecules. Within dinuclear cation, Gd(III)—Gd(III) is bridged by oxygen and nitrogen atoms of the three ligands, resulting in GdGd distance of 0.36353(2) nm. Gd(III) exhibits a distorted 1333 stack coordination environment. Magnetic susceptibility measurements in the temperature range 300–4 K revealed the occurrence of weak antiferromagnetic exchange interaction between two Gd(III) ions with a J value of—0.22, and g of 1.93.