ISSUE:

the sandmeyer reaction is: reaction between arenediazonium salts with copper (I) halides or arenediazonium salts with any copper (I) salt (for example, CuCN)?

thank you

Hello, Sandmeyer consists of the formation of a diazonium salt by reaction of an aromatic amine with sodium nitrite in an acid medium. The nitrogen of the diazonium salt is displaced by nucleophiles, many of which require the presence of Cu(I) as a catalyst (for example: I - , ^Cl - ^, Br ^- , CN ^- CH ₃ S ^- ). However, other nucleophiles do not require this catalyst, such as: H ₂ O, KI, RSH.

Greetings

the snadmeyer reaction is just the displacement of N2 from the diazonium salt. The reaction of the primary aromatic amine with sodium nitrite in an acid medium is called diazoation , which forms the diazonium salt.

Yes, that's right, Sandmeyer starts with diazonium salt.

When this type of reaction is carried out, it is always necessary to previously prepare the diazonium salt by reacting the amine with sodium nitrite in an acid medium, but they are two different reactions. Thank you.