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Gattermann Reaction...

Gattermann Reaction

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Diazonium salts on warming with copper powder and HCl or HBr give the corresponding aryl halide.
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Write the brief note on: Gattermann's Koch reaction

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Gattermann aldehyde synthesis

Decrease in free energy of a reacting system indicates: an exothermic reaction an endothermic reaction a spontaneous reaction a slow reaction.