Light destroys the diazonium salt. Ammonia gas or solution is used as a developer after exposure -- it neutralizes the acid and allows the remaining diazonium salt to combine with the reactant to create a blue dye. The chemicals on the paper acquire color only in the areas not exposed ...
First, make the Grignard reagent from chlorobenzene and quench with an electrophilic NO2 source like tetranitromethane or N2O4. That ought to give nitrobenzene and then you can go about ksr's route. Logged GCT Guest Re:How to synthesise 1-bromo-3-chloro-benzene? « Reply #4 on: June ...
“Normally, the use of diazonium salts takes place in two steps: you first isolate or accumulate the diazonium salt, which is dangerous, and then convert it into the desired product in a second step. In our project, we combine the two synthesis steps and go to the desired product without...