Synthesis, e.s.r. spectrum and magnetic properties of a heterobinuclear complex containing the {FeIII(µ-O)(µ-MeCO2)2MnIII}2+ core

Abstract

The hydrolysis reaction of a 1:1 mixture of LFeCl₃ and LMnCl₃(L =N,N′N″-trimethyl-1,4,7-triazacyclononane) in aqueous sodium acetate solution yields green [LFe^III(µ-O)(µ-MeCO₂)₂Mn^IIIL]²⁺(90%) which displays strong intramolecular antiferromagnetic exchange coupling (J=–145 cm^–1) yielding a doublet ground state; an e.s.r. spectrum showing hyperfine structure has been observed.