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Synthesis and characterization of a bimetallic americium(III) pyrithionate coordination complex.

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The aqueous reaction of sodium pyrithione, (Na)mpo, with 243AmCl3·nH2O yields a dimerized complex, [243Am(mpo)2(μ-O-mpo)(H2O)]2·3H2O. This compound is compared with isostructural lanthanide pyrithionates, where dimerization across the 4f-block is observed to… Click to show full abstract

The aqueous reaction of sodium pyrithione, (Na)mpo, with 243AmCl3·nH2O yields a dimerized complex, [243Am(mpo)2(μ-O-mpo)(H2O)]2·3H2O. This compound is compared with isostructural lanthanide pyrithionates, where dimerization across the 4f-block is observed to be dependent upon the size of the cation. Unlike in most reported Am(III) UV-visible absorption spectra, [243Am(mpo)2(μ-O-mpo)(H2O)]2·3H2O shows significant splitting in the fingerprint excitations. This is attributed to a unique ligand-field environment, where the Am-mpo bonds possess different bonding compared to the Nd(III) analog because of increasing covalent interactions.

Keywords: americium iii; iii; mpo; bimetallic americium; characterization bimetallic; synthesis characterization

Journal Title: Chemical communications
Year Published: 2022

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