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What are Grignard reagents ? Give exampl...

What are Grignard reagents ? Give example.

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Organo magensium halides are called Grignard reagents. The general formula is R-Mg-X. When alkyl halide is treated with magnesium powder in either medium Grignard reagent is obtained.
`R-X+Mgrarr R - MG - X`
Ex : `C_(2)H_(5) - Br + Mg rarr underset("Ethyl magnesium bromide")(C_(2)H_(5) - Mg - Br)`
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