Question

This is a lab question for the synthesis of triphenylmethanol using a Grignard reaction. "After the...

This is a lab question for the synthesis of triphenylmethanol using a Grignard reaction. "After the Grignard reaction is over, and before you added HCl, you notice some unreacted Mg turnings. What implications will this have on your yield of triphenylmethanol? Is it possible to get a 100% yield if not all the Mg has reacted?"

Homework Answers

Answer #1

If the quantity of the Magnesium (Mg) used in the reaction is only one equivalent with respect to the starting material then if any unreacted Mg turnings observed after the reaction, the yield of the product will not be 100% as sufficient Grignard reagent is not available for the complete conversion of the starting material into the product.

However, if one uses excess equivalents (more than one) of Mg in the reaction, in this case even some unreacted Mg turnings doesn't affect the yield of the product.

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
Lab: Grignard Reaction - Triphenylmethanol As an alternative to, or in addition to, drying tubes to...
Lab: Grignard Reaction - Triphenylmethanol As an alternative to, or in addition to, drying tubes to protect a Grignard reaction, some chemists carry out these reactions under dry nitrogen or argon atmosphere. Explain why these are a suitable environment for this reaction. Would dry carbon dioxide work equally well? Explain why or why not. (Explain in 4-5 Sentences)
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...
Organic II lab: Grignard reaction. Preparation of triphenylmethanol At the end of the experiment, what benchtop...
Organic II lab: Grignard reaction. Preparation of triphenylmethanol At the end of the experiment, what benchtop test can you use to show that the obtained product is indeed triphenylmethanol? (Explain how)
With regards to a Cannizzaro Reaction Lab: Post-lab Question #1: A student in your class prepared...
With regards to a Cannizzaro Reaction Lab: Post-lab Question #1: A student in your class prepared his prelab correctly. In his prelab procedure, he had written to add 2.5 mL of concentrated HCl (that is added to the aqueous layer in the last paragraph of the procedure) to the reaction mixture after it was refluxed and transferred to a separatory funnel. a) In regards to chemical reactions, explain what the consequence of this change will be. (1.5 points) b) During...
For The Synthesis of Lidocane answer the following: 1.Why does α-chloro-2,6-dimethylacetanilide only precipitate after an aqueous...
For The Synthesis of Lidocane answer the following: 1.Why does α-chloro-2,6-dimethylacetanilide only precipitate after an aqueous solution of sodium acetate is added? 2.Chloroacetyl chloride is a lachrymator (induces tearing). Give the chemical reaction that occurs on the surface of an eye exposed to this lachrymator. What is the actual agent that produces the irritation and causes the eye to form tears? 3.What happens to the diethylamine that is not extracted from the organic layer when HCl is added and than...
In an experiment of synthesis of Bromoacetanilide - bromination. Procedure 1. Dissolve 1g acetanilide and 1.8g...
In an experiment of synthesis of Bromoacetanilide - bromination. Procedure 1. Dissolve 1g acetanilide and 1.8g of NaBr using 6mL 95% ethanol and 5 mL acetic acid. 2. Cool the resulting mixture in an ice bath to at least 5 C. 3. In fume hood add enough bleach to deliver 0.6g of NaClO. 4. Allow mixture to warm up to room temperature for over 15 minutes. 5. Cool the reaction down in an ice bath and then quench the untracked...
Using the average concentration of NaOH found above, calculate the theoretical pH after 2.50 mL and...
Using the average concentration of NaOH found above, calculate the theoretical pH after 2.50 mL and 9.50 mL of NaOH has been added in both the titration of HCl and of HC2H3O2. Indicate if the volume of NaOH is before or after the equivalence point. Compare these Titration Curves theoretical values with the actual values found on the titration curves created in lab. (Hint: Use total volume of titrant (the initial and final volume on the buret) in conjunction with...
For Reduction of Vanillin aldehyde to Vanillyl alcohol using Nabh4, Aqueous NaOH and HCl If you...
For Reduction of Vanillin aldehyde to Vanillyl alcohol using Nabh4, Aqueous NaOH and HCl If you incorrectly add acid and do not attain a pH of 1, your yield may be lower than it should be as some of your product would not be isolated. Why won’t it be isolated? Notes: This addition of HCl causes four reactions to occur: a. it hydrolyzes the O-B bond in the intermediate and protonates the oxygen atom that was originally the oxygen atom...
What are standard conditions of ΔH° for the data you will use? Temperature 0 K 100...
What are standard conditions of ΔH° for the data you will use? Temperature 0 K 100 K 273 K 298 K Pressure 1.0 Pa 100 Pa 1.0 bar 100 bar Concentration 1.0 g/L 1.0 mol/L 1.0 mg/L mol/kg Select the complete reactions (including phases) for the reaction between solid NaOH and a solution of HCl. 2NaOH(s) + HCl(aq) → 2NaCl(aq) + H2O(l) NaOH(s) + HCl(aq) → NaCl(aq) + H2O(l) NaOH(s) + HCl(aq) → NaCl(s) + H2O(l) Calculate the theoretical ΔH°r...
You are working in a lab and inadvertently place your test tube with enzyme in a...
You are working in a lab and inadvertently place your test tube with enzyme in a 70 °C water bath. Your enzyme is no longer functional and you boss says the excess heat denatured the enzyme. Which of the following types of intermolecular interactions that stabilize the enzyme structure were likely disrupted? Question 7 options: hydrogen bonds salt bridges hydrophobic interactions all of the above Acids disrupt salt bridges that stabilize protein structure, contributing to denaturation. Why was it possible...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT