Examples of Lassaigne Test
The Lassaigne Test can be applied to different organic compounds for test of elements such as sulphur, nitrogen and halogens in them. Some examples of Lassaigne Test are discussed as under:
- For Amines (-NH2 group): Amines are the organic compounds which contain -NH2 functional group. The presence of nitrogen can thus be detected through Lassaigne Test.
- For Thiols (-SH group): Thiols are the organic compounds which contain -SH functional group. The presence of sulphur can thus be detected through Lassaigne Test.
- For Nitroalkanes (-NO2 group): Nitroalkanes are the alkanes containing -NO2 functional group. The presence of nitrogen can be detected in them through Lassaigne Test.
- For Haloalkanes and Haloarenes: Haloalkanes or Haloarenes contain halogen as a functional group. Hence, the presence of halogens in them can be detected through Lassaigne Test.
Lassaigne Test
Lassaigne Test is a set of procedures used to detect the presence of nitrogen, sulphur and halogens in an organic compound. In the theoretical approach, we use different symbols in the molecular formula of a compound to show the presence of a particular element in it but in the practical approach, we use a variety of tests to identify the presence of specific elements through observable reactions or characteristic behaviours when brought in contact with a specific reagent. For instance, when heated, certain metals exhibit certain characteristic flame colours, indicating their presence.
In this article, we will learn about the Lassaigne Test, its principle, the preparation of the Lassaigne Extract, the procedure for the Lassaigne Test, its applications, and some problems based on it.
Table of Content
- What is Lassaigne Test?
- Procedure for the Lassaigne Test
- Examples of Lassaigne Test
- Applications of Lassaigne Test