- Facile and general synthesis of polyphosphane polyoxides with (O)PCP(O) linkages
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Polyphosphane polyoxides with (O)PCP(O) linkages are powerful chelating agents for extraction of actinides from nuclear wastes. They are obtained either by the Michaelis-Arbuzov reaction of chloromethylphosphane oxides and phosphorus(III) esters, or by the reaction of phosphane oxide carbanions with chlorophosphanes. With the latter method, the addition of a phosphane oxide carbanion in excess allowed us to overcome a transmetallation reaction and thereby obtain polyphosphane polyoxides in good yields. The 1H-NMR spectra of the PCH2P groups show the influence of the different R groups attached to the phosphorus atoms. We determined the coupling constants and the chemical shifts of these spin systems.
- Cristau, Henri-Jean,Virieux, David,Mouchet, Patrick,Fruchier, Alain
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p. 1561 - 1569
(2007/10/03)
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- Polydentate Ligands Containing Phosphorus, III Synthesis and Nuclear Magnetic Resonance Studies of Some Unsymmetrical Potentially Tridentate Phosphine Chalcogenide Ligands
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The synthesis via the useful lithium reagent intermediate, (C6H5)2P(S)CH2Li, is reported for eight compounds of the type 2CH, where R is methyl or phenyl and X is an electron pair, oxygen, or sulfur in various combinations.Two related compounds with three and four phosphorus atoms, respectively, per molecule have also been prepared from the same lithium reagent.Tris(diphenylthiophosphoryl)methane has three equivalent phosphorus atoms as indicated by the room temperature phosphorus-31 NMR spectrum, but at reduced temperature a favored conformation exists which has two equivalent phosphorus atoms and a unique one.Other phosphorus-31 and proton NMR data are reported. - Keywords: Polydentate Ligands, Phosphorus Chalcogenides, 31P NMR Spectra
- Grim, Samuel O.,Satek, Larry C.,Mitchell, J. Dale
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p. 832 - 837
(2007/10/02)
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