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Nitro compounds aliphatic

Lundberg, P. (1989) Consensus report for nitromethane. Arbete och Halsa, 32, 86-91 Markofsky, S. (1991) Nitro compounds, aliphatic. In Elvers, B., Hawkins, S. Schulz, G, eds,... [Pg.500]

Nitro compounds. Aliphatic nitro compounds are acidic. They are freed from alcohols or alkyl halides by standing for a day with concentrated sulphuric acid, then washed with water, dried with magnesium sulphate followed by calcium sulphate and distilled. The principal impurities are isomeric or homologous nitro compounds. In cases where the nitro compound was originally prepared by vapour phase nitration of the aliphatic hydrocarbon, fractional distillation should separate the nitro compound from the corresponding hydrocarbon. Fractional crystallisation is more effective than fractional distillation if the melting point of the compound is not too low. [Pg.59]

Nitro compounds Aliphatic r-no2 R-alkyl 870 1615-1540 (vs) (asym) 1390-1320 (vs) (sym) 1390-1320 (vs) -610 (m) (CNO bend) Aromatics absorb at lower frequencies than aliphatic... [Pg.397]

Under suitable conditions it is possible to isolate the A-substituted hydroxylamines that are formed as intermediates in the reduction of nitro compounds. For this purpose it is essential in the reduction of aromatic nitro compounds to work with neutral or nearly neutral solutions suitable reducing agents are hydrogen and platinum oxide catalysts in glacial acetic acid,82,83 zinc dust in ammonium chloride solution,84 aluminum amalgam,85 and ammonium sulfide.86 Aliphatic nitro compounds may be reduced as their alkali salts (nitronates) by diborane in tetrahydrofuran, then giving A-alkylhydroxyl-amines 87 for instance, A-cyclohexylhydroxylamine is thus obtained from nitrocyclohexane in 53% yield. However, aliphatic nitro compounds are converted into A-alkylhydroxylamines more simply by catalytic hydrogenation in the presence of palladium-barium sulfate unlike aromatic nitro compounds, aliphatic nitro compounds require an acid medium for reduction to hydroxylamines an oxalic acid medium has proved the most suitable. [Pg.563]

Nitro compounds, aliphatic 69Mya, 71 Lip Phthalic acids 86Bau, 87Boy... [Pg.364]


See other pages where Nitro compounds aliphatic is mentioned: [Pg.379]    [Pg.1093]    [Pg.668]    [Pg.2575]    [Pg.148]    [Pg.464]    [Pg.682]    [Pg.148]    [Pg.288]    [Pg.587]    [Pg.317]    [Pg.683]    [Pg.241]    [Pg.243]    [Pg.263]    [Pg.4536]    [Pg.312]    [Pg.333]    [Pg.341]    [Pg.341]    [Pg.344]    [Pg.349]    [Pg.224]   
See also in sourсe #XX -- [ Pg.131 ]

See also in sourсe #XX -- [ Pg.241 , Pg.290 ]




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