Mössbauer study of a novel binuclear Fe(II/III) delocalized-valence compound

X. Q. Ding*, E. L. Bominaar, E. Bill, H. Winkler, A. X. Trautwein, S. Drüeke, PH Chaudhuri, K. Wieghardt

*Corresponding author for this work
11 Citations (Scopus)


In this paper, we briefly summarize the main conclusions of the Mössbauer analysis of [L2Fe2(μ-OH)3] (ClO4)2·2CH3OH·2H2O with L=N,N',N"-trimethyl-1,4,7-triazacyclononane, a novel dimeric iron compound, which possesses a central exchange-coupled delocalized-valence Fe(II/III) unit. The complete delocalization of the excess electron in the dimeric iron center is concluded from the indistinguishability of the two iron sites in Mössbauer spectroscopy. The magnetic Mössbauer spectra imply a system spin St=9/2 for the dimer in its ground state. The values for hyperfine and spin-Hamiltonian parameters, obtained from simulations of the Mössbauer spectra, are δ=0.74 mms-1, ΔEQ=-2.14 mms-1, A=-10.6 T, A=-13.5 T and D=1.8 cm-1. The system spin St=9/2 is interpreted to be a consequence of double-exchange coupling.

Original languageEnglish
JournalHyperfine Interactions
Issue number1-4
Pages (from-to)311-315
Number of pages5
Publication statusPublished - 01.07.1990


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