posted by Blair on .
Benzene is often produced as a by-product during the synthesis of phenylmagnesium bromide. how can its formation be explained? Write a balanced chemical equation for the formation of benzene.
This question usually asks why biphenyl is formed?
Benzene is formed when the reaction is quenched as the reaction is usually carried out with excess Grignard Reagent.
PhMgBr + H2O -> PhH + Mg2+ + HO- +Br-
The inorganics form a whitish sludge initially and then the reaction is usually acidified to get the magnesium salts into solution.