Grignard reagent

A Grignard reagent  is a chemical compound with the generic formula R–Mg–X, where X is a halogen and R is an organic group, normally an alkyl or aryl. Two typical examples are methylmagnesium chloride H 3C–Mg–Cl and phenylmagnesium bromide (C6H 5)–Mg–Br. They are a subclass of the organomagnesium compounds. Grignard compounds are popular reagents in organic synthesis for creating new carbon-carbon bonds.  Grignard reagents are extremely reactive solids. They are normally handled as solutions in solvents with an ether group, such as diethyl ether or tetrahydrofuran.

Reactions of Grignard reagents

With carbonyl compounds

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