Ikunupe6v

2022-01-11

Benzene is often produced as a side product during Grignard reactions using phenylmagnesium bromide. How can its formation be explained? Give a balanced equation for its formation.

Andrew Reyes

Expert

The law of conservation of mass requires that the chemical equations be in balance. According to this law, the mass of the reactant and the mass of the product must be equal. On both sides of the equation, every type of element should be identical.

The balanced chemical reaction representing the formation of benzene:
${C}_{6}{H}_{5}MgBr+{H}_{2}O⇒{C}_{6}{H}_{6}+MgBr\left(OH\right)$

alexandrebaud43

Expert

It will happen if there is any water in the reaction system. Grignard regents are very reactive towards water.
$Ar-Mg-Br+H2O⇒Ar-H+HOMgBr$

star233

Expert