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.
Organic Chemistry - Dr Russ, Friday, February 27, 2009 at 5:43am
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.