Question

Grignard reagent is obtained when magnesium is treated with:
A.alkyl halide in the presence of alcohol
B.alkyl halide in the presence of phenol
C.alkyl halide in the presence of dry ether
D.alkyl halide in the presence of alcoholated ether

Answer 1

Hint:
Grignard reagents are extremely good nucleophiles, reacting with electrophiles like carbonyl compounds (aldehydes, ketones, esters, greenhouse gas, etc) and epoxides. They’re also very strong bases and might react with acidic hydrogens (such as alcohols, water, and carboxylic acids).

Complete step by step answer:
Grignard reagents form via the reaction of an alkyl or aryl halide with magnesium metal. The reaction is conducted by adding the organic halide to a suspension of magnesium in an ethereal solvent, which provides ligands required to stabilize the organomagnesium compound. The halide could also be all ( chlorine, bromine, iodine) except fluorine. It’s slightly easier to make Grignard from the iodides and bromides. The halide is that the “X” observed after we talk over Grignard reagents as “$RMgX$”.
 The ether in the presence of which the reaction takes place is also called diethyl ether. It is synthesised by dehydration of ethanol using sulphuric acid.

The chemical action for the assembly of Grignard reagent is as follows:
$R-X+Mg\stackrel{dryether}{\to }R-Mg-X$ (Grignard reagent)
(Grignard reagent)
So the correct answer is option C.

Note: One in every of the foremost common uses of Grignard reagents is in their reaction with aldehydes and ketones to create alcohols. Grignard Reagents also react with Ketones to grant Tertiary Alcohols. Another important reaction of Grignard reagents is that they are visiting raise epoxides to make carbon-carbon bonds. Grignard reagents also increase carbon dioxide to create carboxylates, during a very reaction like their reactions with ketones and aldehydes. The carboxylates are converted to carboxylic acids after addition of acid. Within the reaction of Grignards with aldehydes, the carbon attacks the carbonyl carbon and performs a $1,2-$ addition to grant an alkoxide. In the second step, acid is added to grant you the alcohol.