Advertisements
Advertisements
Question
What is Grignard reagent? How is it prepared? Why are they prepared under anhydrous condition?
Advertisements
Solution
- Grignard reagent: When alkyl halide is treated with magnesium in the dry ether as the solvent, it gives alkyl magnesium halide. This is known as the Grignard reagent.
- The Grignard reagent can be prepared as,
\[\ce{\underset{Alkyl halide}{R - X} + Mg ->[dry ether] \underset{\text{Alkyl magnesium halide (Grignard reagent)}}{R - Mg - X}}\] - Grignard reagents are highly reactive compounds.
- They react with water or compounds containing hydrogen attached to the electronegative element.
Hence, reactions involving Grignard reagent must be carried out under anhydrous condition.
APPEARS IN
RELATED QUESTIONS
Write the structure and IUPAC name of the major product in the following reaction.
\[\begin{array}{cc}
\ce{CH3 - CH - CH2Cl + NaI ->[Acetone]}\\
|\phantom{..................}\\
\ce{CH3\phantom{...............}}
\end{array}\]
Write the structure and IUPAC name of the major product in the following reaction.
Convert the following:
But-1-ene to n-butyl iodide
Predict all the alkenes that would be formed by dehydrohalogenation of the following alkyl halide.
- 2-chloro-2-methylbutane
- 3-bromo-2,2,3-trimethylpentane
Which of the following reaction proves the chlorinating property of phosphorus pentachloride?
Which of the following pairs of aryl halides cannot be prepared directly by electrophilic substitution?
The compound formed when 3, 5-dinitrobenzoic acid reacts with thionyl chloride is ___________.
Identify Sandmeyer's reaction from the following.
Which among the following methods is not suitable for the preparation of alkyl chlorides?
What is the name of reaction involving replacement of diazonium group by chloride using cuprous (I) salt?
Alkyl fluorides are prepared by heating alkyl bromides or chlorides in the presence of metallic fluorides. The reaction is known as ____________ reaction.
Which of the following alkyl halides has the lowest boiling point?
An alkyl iodide on refluxing with aqueous KOH solution gave isopropyl alcohol. The structure of alkyl iodide could be:
Alkyl chloride when treated with sodium iodide in presence of dry acetone forms alkyl iodide. What is the name of this reaction?
Which one of the following is Swartz reaction?
The conversion of ethyl bromide using sodium iodide and dry acetone, this reaction is know as ______.
Choose the false statement from the following.
Explain Swartz reaction.
How is alkyl halide converted into alcohol by using Moist silver oxide?
Explain the preparation of alkyl halide using thionyl chloride (SOCl2).
Complete the following reaction giving major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{...................}\\
\ce{CH3}\phantom{................}
\end{array}\]
The given compound
is an example of ______.
