Question

\[Diazonium~salts + C{u_2}C{l_2} + HCl \to \] , the reaction is known as
A. Chlorination
B. Sandmeyer’s reaction
C. Perkin reaction
D. Carbyl amine reaction

Answer 1

Hint: A group of organic compounds known as diazonium salts have a functional group \[[RN_2]X\] that can have any kind of organic group \[R\], like an aryl or an alkyl, and an inorganic or organic anion, like a halide. It is used in many multiple reactions to form new organic compounds.

Complete step-by-step answer:Diazotization is a chemical reaction in which amine gets converted into diazonium salt with the help of sodium nitrite and HCl at low temperatures of 0-5 degree celsius. The creation of the azo compound is caused by the reaction of benzene-diazonium chloride with another chemical containing a benzene ring known as a coupling specialist, such as phenol or aromatic amine.
By heating aryl azide and cuprous halide, Sandmeyer's reaction produces halobenzene.
Halobenzene is created using Sandmeyer's reaction. For the creation of alkyl fluorides, it cannot be employed. It is an illustration of an aromatic radical-nucleophilic substitution. The Sandmeyer’s reaction for the formation of chlorobenzene is shown below.

Therefore, the given reaction represents Sandmeyer's reaction.

Option ‘B’ is correct

Note:It should be noted that the finding of biaryl byproducts lends support to the radical mechanism of the Sandmeyer reaction. A one-electron transfer mechanism that is catalysed by copper\[(I)\] causes the aromatic diazo group to be replaced with a halogen or pseudohalogen, forming an aryl radical with the loss of nitrogen gas. The substitutes may be produced and the copper\[(I)\] catalyst restored by direct transfer of \[Cl,Br\] or \[OH\] from a copper\[(II)\] species to the aryl radical.