Investigation of the unique magnetic behaviours of isomers in a 1,2-dithiooxalato-bridged diiron() complex

1,2-Dithiooxalate (dto) can be employed as a bridging ligand and it exhibits symmetric ( O , S -chelation) or asymmetric ( O , O - and S , S -chelation) coordination forms. In this study, we prepared a novel dto-bridged diiron( ii ) complex, [{Fe(TPA)} 2 (μ-dto)](ClO 4 ) 2 ( 1 ), where TPA is tris(2...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2023-09, Vol.52 (35), p.12496-1253
Main Authors: Kanetomo, Takuya, Yokoyama, Koki, Suzuki, Yudai, Ida, Hiromichi, Okazawa, Atsushi, Enomoto, Masaya
Format: Article
Language:English
Subjects:
Asymmetry
Chelation
Isomers
Ligands
Magnetic properties
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Summary:1,2-Dithiooxalate (dto) can be employed as a bridging ligand and it exhibits symmetric ( O , S -chelation) or asymmetric ( O , O - and S , S -chelation) coordination forms. In this study, we prepared a novel dto-bridged diiron( ii ) complex, [{Fe(TPA)} 2 (μ-dto)](ClO 4 ) 2 ( 1 ), where TPA is tris(2-pyridylmethyl)amine. Interestingly, the bridging dto ligand exhibited not only the asymmetric form but also a linkage isomer and a diastereomer within the same crystal. Notably, the three isomers of 1 exhibited different magnetic properties, resulting in a multi-step spin crossover behaviour. The compound [{Fe(TPA)} 2 (μ-dto)](ClO 4 ) 2 exhibits multi-step spin crossover behaviour with an irreversible structural change owing to the presence of isomers.
ISSN:1477-9226
1477-9234
DOI:10.1039/d3dt01992f