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Updated: Sep 8, 2025

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
Published on: June 18, 2020
Synthesis, characterisation, and magnetic properties of a permethylindenyl manganocene
Alexander Evans1, Thomas A Q Arnold1, Paul Ransom1
1Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OX1 3TA Oxford, UK. dermot.ohare@chem.ox.ac.uk.
Abstract:
The heptamethylindenyl ligand (C9Me7-; Ind*) has been used to synthesise the manganese complex, (η5-Ind*)2Mn, by lithiation of the proligand and subsequent salt metathesis with MnCl2. The solid state molecular structure indicates a low-spin (S = ½) ground state for the Mn2+ metal centre at 100 K. Solution EPR spectroscopy, solid state magnetic susceptibility measurements, and computational studies suggest the complex undergoes a thermally accessible spin-crossover to a high-spin (S = 5/2) state.
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