Hi, I was wondering if anyone can help me understanding how these reactions work. What is happening by adding CuSO4-5H2O, [NH4+][OH-] and HONH2-HCl (hydroxylammonium chloride) together in an aqueous solution? Is it forming a diazonium salt solution? And when we are mixing the above solution with another diazonium salt [(HO-Benzenering-N-=-N-+)(Cl-)] in a diethyl ether solution what product are we expected to have? Will be azo coupling reaction occurred? I am trying to synthesize a dihydroxyazobenzene and I found this synthetic procedure from a patent. Any idea will be well accepted and appreciated!! Thank you in advance!