Structural and electrochemical characterization of a cerium(IV) hydroxamate complex: implications for the beneficiation of light rare earth ores

Reaction of N-phenyl-pivalohydroxamic acid with Ce-III precursors leads to a homoleptic hydroxamate complex: Ce-IV[(BuC)-Bu-t(O)N(O) Ph](4). Electrochemical experiments indicate a significant stabilization of the Ce-IV cation at E-p,E-c = -1.20 V versus SCE in the hydroxamate ligand framework. The s...

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Published inChemical communications (Cambridge, England) Vol. 50; no. 40; pp. 5361 - 5363
Main Authors Lee, Heui Beom, Bogart, Justin A., Carroll, Patrick J., Schelter, Eric J.
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 01.01.2014
Subjects
Beneficiation
Cations
Chemistry
Chemistry, Multidisciplinary
Ligands
Ores
Physical Sciences
Precursors
Rare earth metals
Science & Technology
Stabilization
Structural analysis
OXIDATION
CORE
GRAVIMETRIC DETERMINATION
EXTRACTION
CE(IV)
CRYSTAL-STRUCTURE
SPECTROPHOTOMETRIC DETERMINATION
ACTINIDES
SEPARATION
SEQUESTERING AGENTS
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Summary:Reaction of N-phenyl-pivalohydroxamic acid with Ce-III precursors leads to a homoleptic hydroxamate complex: Ce-IV[(BuC)-Bu-t(O)N(O) Ph](4). Electrochemical experiments indicate a significant stabilization of the Ce-IV cation at E-p,E-c = -1.20 V versus SCE in the hydroxamate ligand framework. The spontaneous oxidation of Ce-III in a hydroxamate ligand field is discussed in the context of beneficiation of the light rare earths from the fluorocarbonate mineral bastnasite.
Bibliography:ObjectType-Article-1
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ISSN:1359-7345
1364-548X
DOI:10.1039/c3cc46486e