An iron(III) phosphonate cluster containing a nonanuclear ring
H. C. Yao, J. J. Wang, Y. S. Ma, O. Waldmann, W. X. Du, Y. Song, Y. Z. Li, L. M. Zheng, S. Decurtins, X. Q. Xin
Abstract
This communication reports the first example of cyclic ferric clusters with an odd number of iron atoms capped by phosphonate ligands, namely, [Fe9(m-OH)7(m-O)2(O3PC6H9)8-(py)12]. The magnetic studies support a S = 1/2 ground state with an exchange coupling constant of about J = -30 K.
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