An iron(III) phosphonate cluster containing a nonanuclear ring

TL;DR

This paper reports the synthesis and characterization of the first cyclic ferric cluster with an odd number of iron atoms, featuring a nonanuclear ring capped by phosphonate ligands, and explores its magnetic properties.

Contribution

It introduces a novel ferric cluster with a nonanuclear ring structure capped by phosphonate ligands, expanding the understanding of cyclic iron clusters.

Findings

Supports a S = 1/2 ground state

Exchange coupling constant of about J = -30 K

First example of such a cyclic ferric cluster

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.