title: Structural and electrochemical characterization of a cerium(IV) hydroxamate complex: implications for the beneficiation of light rare earth ores.
abstract: Reaction of N-phenyl-pivalohydroxamic acid with Ce(III) precursors leads to a homoleptic hydroxamate complex: Ce(IV)[(t)BuC(O)N(O)Ph]4. Electrochemical experiments indicate a significant stabilization of the Ce(IV) cation at Ep,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 bastnäsite.
authors.affiliation: P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, USA. schelter@sas.upenn.edu.
authors.forename: Heui Beom
authors.initials: HB
authors.lastname: Lee
authors.forename: Justin A
authors.initials: JA
authors.lastname: Bogart
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Carroll
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Schelter