Ferromagnetic Exchange Coupling of Vanadium(IV) dπ Spins across Pyrimidine Rings:  Dinuclear Complexes of Oxovanadium(IV) Bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionate) Bridged by Pyrimidine Derivatives

2001 ◽  
Vol 40 (27) ◽  
pp. 7059-7064 ◽  
Author(s):  
Takayuki Ishida ◽  
Shin-ichi Mitsubori ◽  
Takashi Nogami ◽  
Naoya Takeda ◽  
Masayasu Ishikawa ◽  
...  
2019 ◽  
Vol 15 ◽  
pp. 840-851
Author(s):  
Jennifer Klose ◽  
Tobias Severin ◽  
Peter Hahn ◽  
Alexander Jeremies ◽  
Jens Bergmann ◽  
...  

The synthesis of mixed-ligand complexes of the type [M2L(μ-L')]+, where L represents a 24-membered macrocyclic hexaaza-dithiophenolate ligand, L' is an azobenzene carboxylate co-ligand, and M = Cd(II), Ni(II) or Zn(II), is reported. A series of new complexes were synthesized, namely [M2L(μ-L')]+ (L' = azo-H, M = Cd (1), Ni (2); L' = azo-OH, M = Zn (3), Ni (4); L' = azo-NMe2, M = Zn (5), Cd (6), Ni (7); L' = azo-CO2Me, M = Cd (8), Ni (9)), and characterized by elemental analysis, electrospray ionization mass spectrometry (ESIMS), IR, UV–vis and NMR spectroscopy (for diamagnetic Zn and Cd complexes) and X-ray single crystal structure analysis. The crystal structures of 3' and 5–8 display an isostructural series of compounds with bridging azobenzene carboxylates in the trans form. The paramagnetic Ni complexes 2, 4 and 7 reveal a weak ferromagnetic exchange interaction with magnetic exchange coupling constant values between 21 and 23 cm−1 (H = −2JS1S2). Irradiation of 1 with λ = 365 nm reveals a photoisomerization of the co-ligand from the trans to the cis form.


Polyhedron ◽  
2009 ◽  
Vol 28 (4) ◽  
pp. 695-702 ◽  
Author(s):  
Santarupa Thakurta ◽  
Partha Roy ◽  
Georgina Rosair ◽  
Carlos J. Gómez-García ◽  
Eugenio Garribba ◽  
...  

1989 ◽  
Vol 162 (1) ◽  
pp. 11-13 ◽  
Author(s):  
Teófilo Rojo ◽  
Roberto Cortes ◽  
Luis Lezama ◽  
Jose Luis Mesa ◽  
Gérard Villeneuve

2013 ◽  
Author(s):  
R. Ranjbar ◽  
S. Mizukami ◽  
A. Sugihara ◽  
Q.L. Ma ◽  
S. Iihama ◽  
...  

2008 ◽  
Vol 361 (12-13) ◽  
pp. 3534-3538 ◽  
Author(s):  
Jeffrey D. Rinehart ◽  
Bart M. Bartlett ◽  
Stosh A. Kozimor ◽  
Jeffrey R. Long

2011 ◽  
Vol 83 (10) ◽  
Author(s):  
B. Y. Wang ◽  
N. Y. Jih ◽  
W. C. Lin ◽  
C. H. Chuang ◽  
P. J. Hsu ◽  
...  

1981 ◽  
Vol 20 (3) ◽  
pp. 917-921 ◽  
Author(s):  
Herman. Van Kempen ◽  
Jos A. A. J. Perenboom ◽  
Paul J. M. W. L. Birker

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