Synthesis and characterization of a bimetallic americium(iii) pyrithionate coordination complex†
Zachary K.
Huffman, 
a
Joseph M.
Sperling,
a
Cory J.
Windorff,
ab
Brian N.
Long,
a
Cristian
Celis-Barros
*a
and
a
Joseph M.
Sperling,
a
Cory J.
Windorff,
ab
Brian N.
Long,
a
Cristian
Celis-Barros
*a
and
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.
- This article is part of the themed collection: Chemical Communications HOT Articles 2022
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