BenzeneDiazonium chloride (C6H5-N2Cl) can be converted to another important aromatic organic compounds such as chlorobenzene, bromobenzene by a series of sandmeyer reactions. -N2Cl group is replaced by another group such as -Cl, Br etc. SandMeyer reactions were found in 1884 by a Swiss chemist Traugott Sandmeyer.
In this tutorial, we will discuss following reactions under sandmeyer reactions.
Chlorobenzene is formed when benzenediazonium chloride is treated with CuCl (Copper(I) chloride). Instead of CuCl, you can use copper powder with HCl. In this reaction, Cu+ ion behave as a catalyst.
Bromobenzene is formed when benzenediazonium chloride is treated with CuBr (Copper(I) bromide). Instead of CuBr, you can use copper powder with HBr. In this reaction, Cu+ ion behaves as a catalyst.
When benzenediazonium chloride is treated with CuBr (Copper(I) bromide), Benzonitrile is produced.
Iodobenzene can be produced by the reaction of benzenediazonium chloride and KI (potassium iodide). But, you should heat the reactant medium. For this reaction, Cu+ catalyst is not required as previous three reactions.
You can prepare flurobenzene by the reaction of benzenediazonium chloride and HBF4 (fluoroboric acid).