Libermann's Nitroso test (of Amines)

In summary, the conversation is discussing the mechanism for a certain reaction and the results given in the textbook. The person asking for help believes that the correct answer should be A and C, but the textbook says A, B, and C. There is also a discussion about the correctness of answer B.
  • #1
SpectraPhy09
25
3
Homework Statement
Which of the following amine(s) will show positive Libermann's Nitroso test ?
(It is multiple choice question)
(Plz see the Options in the image I have attached)
Relevant Equations
I don't know any
My answer is coming a & c but given ans is a, b & c in my textbook.
Plz can someone give mechanism for this reaction?
Because my teacher only told that 2° and 1° Amines give the test.
So answer should be a & c na but it's wrong :(
 

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  • #2
Why do you think b is wrong?
 
  • #3
SpectraPhy09 said:
My answer is coming a & c but given ans is a, b & c in my textbook.
There's a correction
My textbook says A & C but my ans was coming A, B & C
mjc123 said:
Why do you think b is wrong?
No, I think b to be correct( Sorry for the typo error)
 

What is Libermann's Nitroso test (of Amines)?

Libermann's Nitroso test is a chemical test used to detect the presence of primary, secondary, and tertiary amines. It involves the reaction of the amine with nitrous acid to form a colored dye, which can be observed visually or measured spectrophotometrically.

What is the principle behind Libermann's Nitroso test?

The principle behind Libermann's Nitroso test is the reaction of amines with nitrous acid to form a diazonium salt, which then reacts with N,N-dimethyl-1-naphthylamine to form a colored dye. The intensity of the color is proportional to the concentration of the amine present.

What are the applications of Libermann's Nitroso test?

Libermann's Nitroso test is commonly used in organic chemistry to identify the presence of amines in a compound. It is also used in the analysis of pharmaceuticals, food products, and environmental samples.

What are the limitations of Libermann's Nitroso test?

One limitation of Libermann's Nitroso test is that it can only detect amines that are soluble in water and react readily with nitrous acid. Amines that are insoluble or do not react with nitrous acid will not give a positive result. Additionally, some compounds may interfere with the test, leading to false positive or negative results.

How is Libermann's Nitroso test performed?

To perform Libermann's Nitroso test, a sample is first dissolved in water and then treated with nitrous acid. This is followed by the addition of N,N-dimethyl-1-naphthylamine, which will produce a colored dye if an amine is present. The intensity of the color can then be measured using a spectrophotometer or observed visually.

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