Question

Why the Grignard reagent should be prepared under anhydrous conditions?

Answer 1

The Grignard reagent should be prepared under anhydrous conditions as it reacts with water to give the corresponding alkane.
R-MgBr + H2O———>R-H +MgBr(OH)

Answer 2

Hey !!

Grignard reagents should be prepared under anhydrous conditions because Grignard reagents are highly reactive. In the presence of moisture they react to give alkanes.

 RMgX + H₂O ------> R ----- H + Mg(OH)X

 Grignard reagent              Alkane

GOOD LUCK !!