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Posted by on Friday, February 27, 2009 at 12:23am.

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 - , 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.

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