Author(s)

Hiroshi Sakiyama, Harry Adams, David E. Fenton, Laura R. Cummings, Paul E. McHugh, Hisashi Okawa

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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 (Co_A and Co_B) in the shape of an isosceles triangle (Co_A1–Co_B–Co_A2), and the contribution of the orbital angular momentum is significant. The exchange interaction between the Co_A and Co_B ions is practically negligible (J = ~ 0), whereas the interaction between the Co_A1 and Co_A2 ions is ferromagnetic (J’ > 0) for both complexes.

Tricobalt(II) Complex; Magnetic Properties; Spin-Orbit Coupling; Exchange Interaction

Sakiyama, H. , Adams, H. , Fenton, D. , Cummings, L. , McHugh, P. and Okawa, H. (2011) Magnetic analyses of isosceles tricobalt(II) complexes containing two types of octahedral high-spin cobalt(II) ions. Open Journal of Inorganic Chemistry, 1, 33-38. doi: 10.4236/ojic.2011.13005.