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CBSE Class 12-science Answered

what is Liebermannsnitrosobromo reaction
Asked by | 08 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 | 05 Jul, 2008, 11:04: AM
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