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• W2317753312 endingPage "1904" @default.
• W2317753312 startingPage "1898" @default.
• W2317753312 abstract "The crystal structures of the complexes formed by reaction of thorium(IV) nitrate with iminodiacetic acid (H2IDA), nitrilotriacetic acid (H3NTA), and ethylenediaminetetraacetic acid (H4EDTA) under hydrothermal conditions are reported. In [Th(HIDA)2(C2O4)]·H2O (1), the metal atom is chelated by two carboxylate groups from two HIDA− anions and by two oxalate ligands formed in situ; two additional oxygen atoms from two more HIDA− anions complete the ten-coordinate environment of bicapped square antiprismatic geometry. The uncoordinated nitrogen atom is protonated and involved in hydrogen bonding. Two different ligands are present in [Th(NTA)(H2NTA)(H2O)]·H2O (2), one of them being a O3,N-chelating trianion which acts also as a bridge toward two neighboring metal ions, and the other being a bis-monodentate bridging species with an uncoordinated carboxylic arm and a central ammonium group. An aqua ligand completes the nine-coordinated, capped square antiprismatic metal environment. The EDTA4− anion in [Th(EDTA)(H2O)]·2H2O (3) is chelating through one oxygen atom from each carboxylate group and the two nitrogen atoms, as in a previously reported molecular complex. Two carboxylate groups are bridging, which, with the addition of an aqua ligand, gives a capped square antiprismatic coordination polyhedron. Aminopolycarboxylate ligands have been much investigated in relation with actinide decorporation and nuclear wastes management studies, and the present results add to the structural information available on their complexes with thorium(IV), which has mainly been obtained up to now by extended X-ray absorption fine structure (EXAFS) spectroscopy. In particular, the bridging (non-chelating) coordination mode of H2NTA− is a novel feature in this context. All three complexes crystallize as two-dimensional assemblies and are thus novel examples of thorium−organic coordination polymers." @default.
• W2317753312 created "2016-06-24" @default.
• W2317753312 creator A5063941923 @default.
• W2317753312 date "2011-01-20" @default.
• W2317753312 modified "2023-09-25" @default.
• W2317753312 title "Solid State Structure of Thorium(IV) Complexes with Common Aminopolycarboxylate Ligands" @default.
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• W2317753312 doi "https://doi.org/10.1021/ic102359q" @default.
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