Question

Why mulliken barker test done in presence of aromatic primary amine?

Answer 1

We deal with the Mulliken Barker Test and the various methods for the preparation of the aromatic nitro hydrocarbons. ... then BO= total no of bonds devide by total no of sigma bonds about N-C bond. ...

Answer 2

Mulliken Barker Test is basically done to test the presence of a single nitro group(-NO₂). It is used for the aromatic compounds with one nitro group. A reducing agent preferably a neutral reducing agent. For example, Zn + NH₄Cl is used. The nitro group is reduced into hydroxylamine group (-NHOH).

The hydroxylamine can be made to react with Tollen's reagent([Ag(NH₃)₂]OH). On reaction with Tollen's reagent, it forms a grey precipitate which on standing turns to black color. This precipitate is of silver and is also called a silver mirror. The primary amine is used in the formation of Tollen's reagent.