what is Liebermannsnitrosobromo reaction

Asked by  | 8th Jun, 2008, 08:45: PM

Expert Answer:

Libermann’s nitroso reaction: The yellow oily nitrosamines when heated with phenol and a few drops of conc. H2SO4 give a green solution. When the green solution is made alkaline with NaOH ,the colour of the solution changes to deep blue. On diluting the blue coloured solution, the colour again changes to red.
                              C6H5OH+H2SO4                   NaOH                                Dilution
N-nitsoamine            green solution         deep blue         red solution
This reaction is called Libermann’s nitroso reaction and is used as atest for secondary amine.

Answered by  | 5th Jul, 2008, 11:04: AM

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