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. 2025 Jul 22;54(29):11427-11433.
doi: 10.1039/d5dt01345c.

Synthesis, characterisation, and magnetic properties of a permethylindenyl manganocene

Alexander Evans  1 , Thomas A Q Arnold  1 , Paul Ransom  1 , Samantha C Binding  1 , William K Myers  2 , Agamemnon E Crumpton  1 , Zoë R Turner  1 , Jean-Charles Buffet  1 , Dermot O'Hare  1
Affiliations

Synthesis, characterisation, and magnetic properties of a permethylindenyl manganocene

Alexander Evans et al. Dalton Trans. .

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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