Magnetic coupling in discrete cyano-bridged MnIII-FeIII motifs: Synthesis, crystal structure, magnetic properties and theoretical study

2010 ◽  
Vol 39 (20) ◽  
pp. 5028 ◽  
Author(s):  
Diana Visinescu ◽  
Luminita Marilena Toma ◽  
Joan Cano ◽  
Oscar Fabelo ◽  
Catalina Ruiz-Pérez ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Theoretical Study ◽  
Magnetic Coupling

New Series of Triply Bridged Dinuclear Cu(II) Compounds: Synthesis, Crystal Structure, Magnetic Properties, and Theoretical Study

2011 ◽  
Vol 50 (21) ◽  
pp. 10648-10659 ◽  
Author(s):  
Nanthawat Wannarit ◽  
Khatcharin Siriwong ◽  
Narongsak Chaichit ◽  
Sujittra Youngme ◽  
Ramon Costa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Theoretical Study

scholarly journals Ferro- and Antiferromagnetic Interactions in Oxalato-Centered Inverse Hexanuclear and Chain Copper(II) Complexes with Pyrazole Derivatives

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2792
Author(s):  
Isabel Castro ◽  
M. Luisa Calatayud ◽  
Marta Orts-Arroyo ◽  
Nicolás Moliner ◽  
Nadia Marino ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Coupling ◽  
Structural Features ◽  
Pyrazole Derivatives ◽  
Spin Hamiltonian ◽  
Temperature Range ◽  
Coordination Center

Two novel copper(II) complexes of formulas {[Cu(4-Hmpz)4][Cu(4-Hmpz)2(µ3-ox-κ2O1,O2:κO2′:κO1′)(ClO4)2]}n (1) and {[Cu(3,4,5-Htmpz)4]2[Cu(3,4,5-Htmpz)2(µ3-ox-κ2O1,O2:κO2′:κO1′)(H2O)(ClO4)]2[Cu2(3,4,5-Htmpz)4(µ-ox-κ2O1,O2:κ2O2′,O1′)]}(ClO4)4·6H2O (2) have been obtained by using 4-methyl-1H-pyrazole (4-Hmpz) and 3,4,5-trimethyl-1H-pyrazole (3,4,5-Htmpz) as terminal ligands and oxalate (ox) as the polyatomic inverse coordination center. The crystal structure of 1 consists of perchlorate counteranions and cationic copper(II) chains with alternating bis(pyrazole)(µ3-κ2O1,O2:κO2′:κO1′-oxalato)copper(II) and tetrakis(pyrazole)copper(II) fragments. The crystal structure of 2 is made up of perchlorate counteranions and cationic centrosymmetric hexanuclear complexes where an inner tetrakis(pyrazole)(µ-κ2O1,O2:κ2O2′,O1′-oxalato)dicopper(II) entity and two outer mononuclear tetrakis(pyrazole)copper(II) units are linked through two mononuclear aquabis(pyrazole)(µ3-κ2O1,O2:κO2′:κO1′-oxalato)copper(II) units. The magnetic properties of 1 and 2 were investigated in the temperature range 2.0–300 K. Very weak intrachain antiferromagnetic interactions between the copper(II) ions through the µ3-ox-κ2O1,O2:κO2′:κO1′ center occur in 1 [J = −0.42(1) cm−1, the spin Hamiltonian being defined as H = −J∑S1,i · S2,i+1], whereas very weak intramolecular ferromagnetic [J = +0.28(2) cm−1] and strong antiferromagnetic [J’ = −348(2) cm−1] couplings coexist in 2 which are mediated by the µ3-ox-κ2O1,O2:κO2′:κO1′ and µ-ox-κ2O1,O2:κ2O2′,O1′ centers, respectively. The variation in the nature and magnitude of the magnetic coupling for this pair of oxalato-centered inverse copper(II) complexes is discussed in the light of their different structural features, and a comparison with related oxalato-centered inverse copper(II)-pyrazole systems from the literature is carried out.

Theoretical study of Sr2Fe1–xNb1+xO6 system: Electronic and magnetic properties and crystal structure

2021 ◽  
pp. 110499
Author(s):  
J.L. Rosas-Huerta ◽  
J.E. Antonio ◽  
E.P. Arévalo-López ◽  
H. Muñoz ◽  
M.L. Marquina ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Theoretical Study ◽  
Electronic And Magnetic Properties

Crystal structure and magnetic properties of V-doped YCo2 and YCo3 and their hydrides

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