TITLE:
Magnetic analyses of isosceles tricobalt(II) complexes containing two types of octahedral high-spin cobalt(II) ions
AUTHORS:
Hiroshi Sakiyama, Harry Adams, David E. Fenton, Laura R. Cummings, Paul E. McHugh, Hisashi Okawa
KEYWORDS:
Tricobalt(II) Complex; Magnetic Properties; Spin-Orbit Coupling; Exchange Interaction
JOURNAL NAME:
Open Journal of Inorganic Chemistry,
Vol.1 No.3,
October
24,
2011
ABSTRACT: The observed magnetic data for two isosceles tricobalt(II) complexes have been successfully analyzed, considering the axial distortion around each cobalt(II) ion, the local spin-orbit coupling, the anisotropic exchange interactions, and the intermolecular exchange interactions. The complexes each contains two types of octahedral high-spin cobalt(II) ions (CoA and CoB) in the shape of an isosceles triangle (CoA1–CoB–CoA2), and the contribution of the orbital angular momentum is significant. The exchange interaction between the CoA and CoB ions is practically negligible (J = ~ 0), whereas the interaction between the CoA1 and CoA2 ions is ferromagnetic (J’ > 0) for both complexes.