Reactions of [Ce(IV)(LOEt)2Cl2] (LOEt(-) = [Co(η(5)-C5H5){P(O)(OEt)2}3](-)) and [Ce(μ-O){N(Pr(i)2PO)2}4Cl2] with PhIO afford the λ3-iodane complexes [Ce(IV)(LOEt)2{OI(Cl)Ph}2] and [Ce{N(Pr(i)2PO)2}3{OI(Cl)Ph}], respectively, whereas that between [Ce(IV)(LOEt)2Cl2] and PhIO2 or excess PhIO yields the λ5-iodane adduct [Ce(IV)(LOEt)2{OI(O)ClPh}2]. The crystal structures of the Ce(IV)λ3- and λ5-iodane complexes have been determined and their oxo transfer reactivities have been investigated.

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http://dx.doi.org/10.1039/c6dt00267fDOI Listing

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Article Synopsis
  • The iodine L-edge X-ray Absorption Near Edge Structure (XANES) helps assess oxidation states of iodine compounds, showing a range from -1 to +7 with corresponding edge energies.
  • A unique iron complex of iodosylbenzene was calibrated and found to have an oxidation state of +1.6, reduced from its precursor, indicating significant chemical interactions.
  • The study utilized X-ray diffraction and EXAFS to reveal the crystal structures of PhIO and a new phase, β-PhIO, characterized by halogen-bonded chains that contribute to their low solubility, while the new phase notably differs from an older version in its lamellar stacking.
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Reactions of [Ce(IV)(LOEt)2Cl2] (LOEt(-) = [Co(η(5)-C5H5){P(O)(OEt)2}3](-)) and [Ce(μ-O){N(Pr(i)2PO)2}4Cl2] with PhIO afford the λ3-iodane complexes [Ce(IV)(LOEt)2{OI(Cl)Ph}2] and [Ce{N(Pr(i)2PO)2}3{OI(Cl)Ph}], respectively, whereas that between [Ce(IV)(LOEt)2Cl2] and PhIO2 or excess PhIO yields the λ5-iodane adduct [Ce(IV)(LOEt)2{OI(O)ClPh}2]. The crystal structures of the Ce(IV)λ3- and λ5-iodane complexes have been determined and their oxo transfer reactivities have been investigated.

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Metabolism of metapramine in vitro by chemical model systems and rat liver microsomes.

Arzneimittelforschung

December 1989

Laboratoire de Chimie Organique, Faculté de Pharmacie de Lyon, France.

Metapramine (Timaxel) was oxidised by hepatic microsomes from rat and by biomimetic chemical systems; vanadyl acetylacetonate-iodylbenzene, phthalocyanin-iron II-iodosylbenzene, meso tetraphenyl porphyrine-iron III chloride-iodosylbenzene and Fenton's reagent. The major metabolite in all cases was the monodemethylated product formed by oxydative removal of the methyl group on the endocyclic nitrogen atom.

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