Question

A Grignard's reagent may be made by reacting magnesium with
A. Methyl amine
B. Diethyl ether
C. Ethyl iodide
D. Ethyl alcohol

Answer 1

Hint: In the given question we need to identify from the four given options which of them will react with magnesium to give Grignard’s reagent as a product. Grignard’s reagents are generally prepared by reacting an aryl halide or an alkyl halide with magnesium.

Complete step-by-step answer:A Grignard reagent is a magnesium compound which is represented by the formula $R - Mg - X$ where $R$ refers to an alkyl group and $X$ refers to a halogen.
${C_2}{H_5}I + Mg \to {C_2}{H_5} - Mg - I$

Dry ether is a solvent. It is an organic compound in the ether class. It is a colorless, highly volatile, sweet-smelling liquid.

The chemical formula of Ethyl iodide is ${C_2}{H_5}I$
The chemical formula of Ethyl magnesium iodide is ${C_2}{H_5} - Mg - I$

Option ‘C’ is correct

Additional Information:Ethyl iodide is also called as iodoethane. It is a colorless, flammable chemical compound. It is generally prepared by heating ethanol with iodine and phosphorus. When it comes in contact with light, it decomposes and turns yellow or red. The boiling point of iodoethane is nearly ${72^ \circ }$.

Note: This question is taken from the organic part of chemistry which deals with the study of properties, reactions, structures and preparation of carbon-containing compounds. Grignard reagent is used as a very important reagent in the formation of many organic compounds. Its alkyl part may vary according to the requirement of the organic synthesis.