Question

Grignard reaction questions? a. Ethanol is often present in solvent-grade diethyl ether. If this grade, rather...

Grignard reaction questions?

a. Ethanol is often present in solvent-grade diethyl ether. If this grade, rather than anhydrous were used, what effect would the ethanol have on the formation of the Grignard reagent?

b. Why is it necessary to acidify the mixture (addition of HCl) after the completion of Grignard reaction?

c. Why is it necessary to clean and cut the magnesium ribbon into small pieces in the preparation of Grignard reagent?

Thank you

Homework Answers

Answer #1

a) The Grignard reagent formed would be destroyed by its reaction with ethanol

Grignard reaction carried out in an anhydrous solvent. Because the Grignard reagent formed would be destroyed by its reaction with water present in a non-anhydrous solvent. water present will convert the Grignard reagent to R-H.

b) Dilute hydrochloric acid is added to the reaction mixture to protonate the salts, as well as to dissolve the magnesium salts

c) the reaction takes place on the surface of the metal. The reaction proceeds through single electron transfer

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Grignard reaction questions? a. Give equations for a detailed procedure showing the conversion of 1-bromoheptane to...
Grignard reaction questions? a. Give equations for a detailed procedure showing the conversion of 1-bromoheptane to 3-decanol using a Grignard reaction. b. Why is it necessary to clean and cut the magnesium ribbon into small pieces in the preparation of Grignard reagent? c. Why care must be taken to have the reagents and apparatus completely dry when a Grignard reaction is performed. What could be a major side reaction if water were present? d. Ethanol is often present in solvent-grade...
If, by mistake, a chemist used 100% ethanol rather than diethyl ether as the reaction solvent,...
If, by mistake, a chemist used 100% ethanol rather than diethyl ether as the reaction solvent, would the Grignard synthesis still proceed as expected?
Synthesis of Triphenylmethanol Why must the reaction be anhydrous?               The water will protonate the Grignard reagent...
Synthesis of Triphenylmethanol Why must the reaction be anhydrous?               The water will protonate the Grignard reagent The water will perform an electrophilic addition with the product of the reaction The water will deprotonate the Grignard reagent The water will perform a nucelophilic substitution with the product of the reaction When performing a Grignard reaction it is also very important that the reaction be free from acetone (a chemical we commonly use to clean the glassware). Why must the glassware be...
Grignard Reaction: 1. it is perfectly acceptable to use wet diethyl ether during the isolation of...
Grignard Reaction: 1. it is perfectly acceptable to use wet diethyl ether during the isolation of the product. Why is it unnecessary to use anhydrous diethyl ether at this stage? 6. Why was potassium carbonate used in the distillation of 2-methyl-2-hexanol? Use the curved-arrow notation to draw a mechanism to show what likely would have occurred if the potassium carbonate was omitted
These are grinard experiment questions from organic chemistry lab 1) why is it ao critical to...
These are grinard experiment questions from organic chemistry lab 1) why is it ao critical to the Grinard formation that the diethyl ether solvent be from a freshly-opened can of anhydrous ether? 2) What is the purpose of mechanically-abrading the surface of the Mg pieces prior to use? 3) Work up the magnesium alkoxide product specifies adding cold 1.0M H2SO4 to the crude reaction mixture. Do you think other acids might be used instead of sulfiric for the operation? Why...
LLE is often performed to separate an organic product from a reaction mixture. Diethyl ether is...
LLE is often performed to separate an organic product from a reaction mixture. Diethyl ether is used in this oxidation reaction. Why is more thanone extraction of the aqueous layer required? Explain on a microscopic level.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT