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Halogen Derivatives — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryHalogen Derivatives3 Marks
Question
How is Grignard reagent prepared ?
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Answer

Grignard reagent is an alkyl magnesium halide, $R - Mg - X$ obtained by the reaction of alkyl halide $R - X$ with magnesium $( Mg )$ in dry ether.
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When an alkyl halide like $CH _3$ l is added from a dropping funnel to a flask containing pieces of pure $Mg$ in pure and dry ether (diethyl ether) and a trace of iodine, Grignard reagent, $CH _3- Mg - I$ is formed.
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Ethyl iodide when treated with magnesium in presence of dry ether forms ethyl magnesium iodide.
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