Grignard Reagents are very reactive class of Organo-metallic compounds. Grignard reagent is composed of Alkyl group attached through polar covalent bond to Magnesium and a Halogen atom attached via ionic bond to magnesium. Hence, being more reactive in nature it can readily react with any moisture (water) or any other Acid capable of donating H⁺ to produce hydrocarbons.
Examples:
CH₃MgBr + H₂O → CH₄ + HOMgBr
CH₃MgCl + HCl → CH₄ + MgCl₂
Result:
When Grignard reagent is treated with aqueous HCl it will produce Methane (or any other Hydrocarbon) gas instead of reacting with Ketone to produce tertiary Alcohol.
