Spin-spin coupling in copper(II) complexes of Pentane-2,4-dione

1974 ◽  
Vol 27 (9) ◽  
pp. 1843 ◽  
Author(s):  
CG Barraclough ◽  
RW Brookes ◽  
RL Martin

A number of complexes in the series Cu(acac)(X), where X = OMe-, OEt-, OCH2Ph-, N3- and pz- (the pyrazolate anion), have been prepared and their magnetic properties determined down to liquid nitrogen temperatures. Also reported is the complex Cu2(acac)2(OH)(pz). In each case, the magnetism is interpreted in terms of spin coupling within a binuclear unit. All coupling is antiferromagnetic in nature, except for X = N3- which appears to be weakly ferromagnetic.

1968 ◽  
Vol 21 (6) ◽  
pp. 1517 ◽  
Author(s):  
den Bergen A van ◽  
KS Murray ◽  
BO West

The magnetic susceptibilities of iron(111) N-substituted salicylaldimine complexes of types Fe(sal-XR)3, Fe(sal-NR)2X, [Fe(salH-KR)2X]X, (X = Cl, Br), and [Fe(sal-NR)2]2O have been measured over the temperature range 90-300�K.? The mononuclear complexes exhibit normal high-spin (S = 5/2), Curie-Weiss behaviour. The binuclear oxygen-bridged complexes show antiferromagnetic behaviour and the results have been analysed using the spin-spin coupling mechanism. The exchange interaction is found to be independent of the nature of the N-substituent on the Schiff base. It appears that bulk susceptibility measurements alone cannot unambiguously specify the formal spin state of the ferric ion in these binuclear complexes.


1997 ◽  
Vol 91 (5) ◽  
pp. 897-907 ◽  
Author(s):  
SHEELA KIRPEKAR ◽  
THOMAS ENEVOLDSEN ◽  
JENS ODDERSHEDE ◽  
WILLIAM RAYNES

Author(s):  
Fabio Luiz Paranhos Costa ◽  
Ana Carolina Ferreira de Albuquerque ◽  
Rodolfo Goetze Fiorot ◽  
Luciano Morais Lião ◽  
Lucas Haidar Martorano ◽  
...  

The calculation of NMR parameters for natural products was pioneered by Bifulco and coworkers in 2002. Since then, modelling 1H and 13C chemical shifts and spin-spin coupling constants for this...


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