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Grade: 11


Why we use the presence of dry ether in wurtz reaction or what is role of dry ether in wurtz reaction

9 years ago

Answers : (7)

GAVEESH bhardwaj
18 Points


9 years ago
Sudheesh Singanamalla
114 Points

Wurtz reaction is carried out with sodium metal which is highly reactive, hence, we have to select a solvent which will not react with the sodium metal. Thus ether becomes the best choice. Similarly the alkyl halide should also dissolve in the solvent . The sodium halide formed should be insolulbe in the solvent which can be easily removed, and alkane formed should remain in solution,  

it requires an aprotic solvent as the medium of the reaction.Dry ether proves to be a very good non-polar, aprotic solvent for this purpose.HENCE DRY ETHER IS USED.

eg. CH3I ----------> CH3 - CH3  (in presence of Sodium and Dry ether)

Please approve !

9 years ago
harshit gupta
13 Points
							Wurtz reaction of ethyl bromide with sodium metal in dry ether(reaction of haloalkane)Ch3ch2br + 2Na + br2hc-ch3~~~~~>ch3ch2ch2ch3 + 2NaBr
4 years ago
Anshul Chaudhary
20 Points
							Because Na reacts with less hindered carbon as a nucleophile. And also dry ether is a very good poly-aprotic solvent. Hence, it is a suitable catalyst for this reaction.
3 years ago
11 Points
							Dry ether is used to absorb moisture content  because metals are highly reactive with water which can form oxide and hydroxides and disturb the reaction .
3 years ago
sagar kelwdakar
15 Points
when methyl bromide react with a sodium metals in presence of dry ether it gives higher ehane and sodium bromide this reaction follow the mechanism of nucliophilic substitution reaction 
2 years ago
Kushagra Madhukar
askIITians Faculty
605 Points
Dear student,
Please find the answer to your problem.
In Wurtz reaction, dry ether, or acetone usually, acts as a solvent. This is taken because, we want the sodium to react with the halogen in the organic compound. The mechanism involved is free Radical as well as anionic mechanism. If any polar solvent like water is used, it will ionize sodium and may result in some oxides or hydroxides of Na or some other ionic reaction to take place, such that sodium halide is not formed.
Hence, we need a solvent that cannot ionize sodium and let the reaction progress in the way we want it to, and dry ether perfectly fits those requirements.
Hope it helps.
Thanks and regards,
4 months ago
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