NMR Studies of Phosphorus Compounds (1965–1969)

Mavel, Gérard

doi:10.1016/s0066-4103(08)60357-9

Cited by 27 publications

(19 citation statements)

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“…HF solutions were prepared by condensing 1-2 g of anhydrous HF into 10 mL acetonitrile. The following compounds were identified by their nmr spectra: PhPF2 (1 l), PhP(0)F2 (12), PhPF(0Me) ( 3 , PhP(OMe)2 (12), PhP(O)H(OMe) (12), PhP(O)F(OMe) ( l l ) , and PhPF3H (1, 13).…”

Section: Methodsmentioning

confidence: 99%

Phenylfluorophosphoranes: axial–equatorial fluorine exchange in RC₆H₄PF₃H and intermolecular exchange in the PhPF₂(H)OMe–MeOH–base system

Kruczynski¹,

Lemire²,

Marat³

et al. 1990

Can. J. Chem.

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. Can. J. Chem. 68,488 (1990). Activation parameters for axial-equatorial fluorine exchange in arylfluorophosphoranes RC6H4PF3H, where R = o-CF3, m-CF3, p-CF3, m-CH3, were studied by the dynamic nmr technique: hGZg8 varied between 53 and 56 kl mol-'.The synthesis of difluoromethoxyphenylphosphorane, PhPF2(H)OMe, from PhPF2 and MeOH is catalyzed by small amounts of Et3N, pyridine, PhPF3H, or HF. Rapid intermolecular ligand exchange occurs in PhPF2(H)OMe after addition of methanol and a base such as triethylamine or pyridine. Under these conditions, exchange of fluorine, hydrogen, and methoxy ligands occurs, as shown by IH, "F, and 3 1~ nmr. From a line shape analysis of the 3 1~{ 1~} nrnr spectrum, the rate of P-F cleavage was found to be first order (1.17 2 0.2) in Et3N concentration, with = 50 kl mol-I and AS" = -67 J mol-' degP'. An equilibrium constant of 1.8 at 25°C was found for the reaction of PhPF2(H)OMe with PhPF2. Key words: axial-equatorial fluorine exchange in RC6H4PF3H intermolecular exchange in the PhPF2(H)OMe-MeOH-base system; 31P and 19F nmr study of ligand exchange in phosphoranes. de la forme des bandes du spectre rmn du 3 1~{ 1~} , on a trouvt que la vitesse de clivage de la liaison P-F est du premier ordre(1,17 * 0,2) en Et3N alors que le AGg8 = 50kl mol-I et le AS" = -67 J mol-I deg-'.

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Section: Methodsmentioning

confidence: 99%

Phenylfluorophosphoranes: axial–equatorial fluorine exchange in RC₆H₄PF₃H and intermolecular exchange in the PhPF₂(H)OMe–MeOH–base system

Kruczynski¹,

Lemire²,

Marat³

et al. 1990

Can. J. Chem.

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“…Für die Differenzen ZlJ(PH) = J(PH)Kompiex-^(PH)Ligand werden daher in Übereinstimmung mit früheren Untersuchungen [7,13,14] und Literaturangaben [15] Werte von ca. 12 Hz ermittelt.…”

Section: Kernresonanzspektrenunclassified

Perfluormethyl-EIement-Liganden, XXII [1]. Darstellung und spektroskopische Untersuchung von Cr(CO)₅L-Komplexen (L=R₂EER′₂, R₂EE′R; R, R′ =CH₃, CF₃; E = P, As; E′ =S, Se, Te) / Perfluoromethyl Element Ligands, XXII [1]. Preparation and Spectroscopic Investigation of Cr(CO)₅L Complexes (L = R₂EER′₂, R₂EE′R; R, R′ = CH₃, CF₃; E = P, As; E′ = S, Se, Te)

Grobe

Van

1979

Zeitschrift Für Naturforschung B

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“…Muller et al [17] reported 31 P shifts of 63 different OP compounds, and the relation between the chemical shift and the structure was discussed on theoretical basis. Since then, 31 P NMR spectroscopy [18,19] has established its usefulness in the analysis of OP compounds.…”

Section: Introductionmentioning

confidence: 99%

Use of NMR techniques for toxic organophosphorus compound profiling

Koskela

2010

Journal of Chromatography B

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NMR Studies of Phosphorus Compounds (1965–1969)

Cited by 27 publications

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Phenylfluorophosphoranes: axial–equatorial fluorine exchange in RC₆H₄PF₃H and intermolecular exchange in the PhPF₂(H)OMe–MeOH–base system

Phenylfluorophosphoranes: axial–equatorial fluorine exchange in RC₆H₄PF₃H and intermolecular exchange in the PhPF₂(H)OMe–MeOH–base system

Use of NMR techniques for toxic organophosphorus compound profiling

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NMR Studies of Phosphorus Compounds (1965–1969)

Cited by 27 publications

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Phenylfluorophosphoranes: axial–equatorial fluorine exchange in RC6H4PF3H and intermolecular exchange in the PhPF2(H)OMe–MeOH–base system

Phenylfluorophosphoranes: axial–equatorial fluorine exchange in RC6H4PF3H and intermolecular exchange in the PhPF2(H)OMe–MeOH–base system

Use of NMR techniques for toxic organophosphorus compound profiling

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Phenylfluorophosphoranes: axial–equatorial fluorine exchange in RC₆H₄PF₃H and intermolecular exchange in the PhPF₂(H)OMe–MeOH–base system

Phenylfluorophosphoranes: axial–equatorial fluorine exchange in RC₆H₄PF₃H and intermolecular exchange in the PhPF₂(H)OMe–MeOH–base system