Magnetic Properties of Some Triangular Trinuclear Complexes of [Ru2M(μ-CH3COO)63-O)(py)3]n+ with a Paramagnetic Ion M

Hanako Kobayashi, Norikiyo Uryû, Iwao Mogi, Ryo Miyamoto, Yasunori Ohba, Masamoto Iwaizumi, Yoichi Sasaki, Akihiro Ohto, Masaaki Suwabe, Tasuku Ito

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Abstract

Magnetic susceptibilities and electron paramagnetic resonances (EPRs) of coordination compounds of triangular trinuclear [Ru2M(μ-CH3COO)63-O)(py)3]n+, M=Mn(II), Fe(III), Cr(III), Ni(II), or Co(II) ions, were observed. The results were analysed by the spin vector model. Effective Bohr magneton numbers showed that the main superexchange interaction within each cluster was of the order of J/k=-300 K. This was considered to be working through μ3-O. Together with some weaker superexchange interactions through μ-CH3COO paths, fittings with the susceptibilities of the model were tried. EPR signals at temperatures of a few K were characteristic of each M ion. M=Mn(II) and M=Fe(III) were at high spin states of S=5/2 and M=Co(II) was at a low spin state of S=1/2. Temperature dependences of EPR signals are discussed.

Original languageEnglish
Pages (from-to)3163-3172
Number of pages10
JournalBulletin of the Chemical Society of Japan
Volume69
Issue number11
DOIs
Publication statusPublished - 1996 Nov

ASJC Scopus subject areas

  • Chemistry(all)

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