Ml. Hernandez et al., Structural analysis and magnetic properties of the 1-D compounds [M(NCS)(2)bpa(2)] [M = Fe, Co, Ni and bpa = 1,2-bis(4-pyridyl)ethane], J CHEM S DA, (9), 1999, pp. 1401-1406
Citations number
33
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
The increasing interest in designing polymeric compounds has focused this w
ork on the synthesis and magnetostructural characterization of three 1-D co
mpounds of general formula [M(NCS)(2)bpa(2)] [M = Fe, Co, Ni and bpa = 1,2-
bis(4-pyridyl)ethane] which exhibit double bpa bridges between metallic cat
ions. X-Ray single crystal diffraction analysis was carried out on 1 [Fe(NC
S)(2)bpa(2)] while for 2 [Co(NCS)(2)bpa(2)] and 3 [Ni(NCS)(2)bpa(2)] the st
ructural characterization was performed on powdered samples. UV-VIS results
were consistent with high-spin metallic cations in tetragonally distorted
octahedral fields. Although in the three compounds weak antiferromagnetic c
oupling has been observed taking place through the -M-(bpa)(2)-M- bridges,
for the theoretical analysis of the global magnetic behaviour of all of the
m some other effects have been considered, i.e. zero field splitting and sp
in-orbit coupling.