- HIGH PERFORMANCE LIQUID CHROMATOGRAPHY OF SOME N-PENTAFLUOROPHENYL DERIVATIVES
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Performic acid oxidation of pentafluorophenylaniline was examined.High-performance liquid chromatography (HPLC) was applied to the separation and analysis of pentafluoronitrosobenzene, decafluoroazoxybenzene, pentafluorophenylhydroxylamine and pentafluoroaniline.Oxidation of the hydroxylamine occurred during elution.The identity and purity of the chromatographic peaks were established by an Evaluation programme.
- Ang, H. G.,Kwik, W. L.,Ong, K. K.
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p. 321 - 330
(2007/10/02)
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- EFFECT OF FLUORINE SUBSTITUTION ON STRETCHING VIBRATIONS OF THE AZOXY GROUP IN AZOXYBENZENES
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The IR and Raman spectra of azoxybenzene (I) and a number of its fluoroderivatives have been analysed, including the (15)N and (18)O labelled samples and complexes of some aszoxybenzenes with SbCl5.On the basis of the calculated frequencies and forms of n
- Korobeinicheva, I. K.,Fugaeva, O. M.,Furin, G. G.
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p. 373 - 384
(2007/10/02)
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- N-(POLYFLUOROARYL)-HIDROXYLAMINES. SYNTHESIS AND PROPERTIES
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Fluorine-containing N-arylhydroxylamines have been obtained by the reaction of hydroxylamine or its N- and O-derivatives on polyfluorinated benzenes and pentafluoropyridine.The influence of fluorine atoms on the reactivity of hydroxylamino group has been investigated.The reaction of N-polyflouroarylhydroxylamines with aldehydes has been shown not to occur, whereas their reaction with nitrosobenzenes leads to azoxybenzenes and with Lewis acids leads to corresponding nitrosobenzenes, azoxybenzenes and anilines.The action of acids on 2,3,5,6-tetrafluorophenylhydroxylamine leads to the acid-catalyzed rearrangement of the latter into 4-amino-2,3,5,6-tetrafluorophenol.C,N-Diarylnitrones have been obtained by the oxidation with MnO2 of fluorine-containing arylhydroxylamines possessing the CH-fragment in an α-position.
- Miller, A.O.,Furin, G. G.
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p. 247 - 272
(2007/10/02)
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