Synthesis, redox behavior, magnetic properties, and crystal structure of a nickel(II)-semiquinone adduct with an unusually strong ferromagnetic coupling

1988 ◽  
Vol 27 (16) ◽  
pp. 2831-2836 ◽  
Author(s):  
Cristiano Benelli ◽  
Andrea Dei ◽  
Dante Gatteschi ◽  
Luca Pardi
2000 ◽  
Vol 55 (11) ◽  
pp. 1067-1073 ◽  
Author(s):  
C. T. Zeyrek ◽  
A. Elmali ◽  
I. Svoboda ◽  
H. Fuess

[Cu4(L)2(O2CMe)2] H2O (L = 1,3-bis(5-bromo-2-hydroxybenzylidene)propan-2-ol) was synthesized and its crystal structure determined. (C38H34N4O10Br4Cu4)·H2O, monoclinic, space group P21/c, a = 21.072(5), b = 9.673(2), c = 21.934(4) Å, β = 109.73(2)°, V = 4208(2) Å3, Z = 4. The crystal structure consists of two independent binuclear copper(II) complexes and the non-coordinating water molecule in the asymetric unit. The Cu(II) ions are in a square-planar geometry and coordinated by donor atoms of the ligand (NO3).The average Cu···Cu distance and average Cu-O-Cu angle are 3.491(2) Å and 132.0(1)°, respectively. Temperature-dependent magnetic susceptibility measurements of the complex show an intramolecular anti ferromagnetic coupling in the dimeric Cu(II) core. The fitting parameters are -2J = 174.4 cm-1, g = 1.98.


2011 ◽  
Vol 509 (17) ◽  
pp. 5200-5205 ◽  
Author(s):  
H. Michor ◽  
G. Hilscher ◽  
O. Myakush ◽  
N. Pyk ◽  
P. Myronenko ◽  
...  

2008 ◽  
Vol 361 (9-10) ◽  
pp. 2747-2758 ◽  
Author(s):  
Jayanthi Narayanan ◽  
Alejandro Solano-Peralta ◽  
Víctor Manuel Ugalde-Saldivar ◽  
Roberto Escudero ◽  
Herbert Höpfl ◽  
...  

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