What is the purpose of adding 50% sodium hydroxide solution in Wittig reaction.
Question 13
What is the purpose of adding 50% sodium hydroxide solution in Wittig reaction.
A) reactant B) recrystallization C) deprotonation D) Solvent
Question 14
What is the purpose of anhydrous calcium chloride pellets in wittig reaction.
A) Drying aqueous layer B) Reactant C) Reagent D) Drying organic layer
Question 15
Provide the structure of the ylide needed to prepare 3-ethyl-3-heptene from 3-pentanone using a Wittig reaction.
Homework Answers
Ques 13:- Right ans is option C , 50% NaoH solution is used for deprotonation so that ylide can easily be formed.
Ques 14:- Right ans is option D , Anhydrous calcium chloride pellets in used for drying organic layer.
Ques 15:- Right ans is option C , because in product there are total 9 carbons and in reactant already 5 carbons are present so we need 4 carbons to get the product and mechanism will be same as per wittig reaction by the formation of ylide
Add Answer to:
What is the purpose of adding 50% sodium hydroxide solution in Wittig reaction.
Based on the Wittig Reaction exp. below, please answer a) and b). In b) you can...
Based on the Wittig Reaction exp. below, please answer a) and
b). In b) you can disregard the part about the IR, just please
interpret and assign protons, shift values, which protons are for
which groups, etc on the HNMR. The % yield was 34%, and MP was
lower than expected (to assist with answering part a). This should
be all the information you need to answer the question.
HNMR
Discuss the percentage yield of the reaction. Explain and provide...
This procedure was conducted for diethyl n-butylmalonate. The question is: What is the purpose of the...
This procedure was conducted for diethyl n-butylmalonate. The
question is: What is the purpose of the tricaprylmethylammonium
chloride and why is it used in a nomstoichiometric?
Chapter 42 Malonic Ester of a Barbiturate 541 Into a 5-mL long-necked, round-bottomed flask, weigh 40 mg of tricaprylmethylammonium chloride, 400 mg of diethyl malonate, 350 mg of 1-bromobutane, and 415 mg of anhydrous potassium carbonate. Attach the empty distillation column as an air condenser and reflux the mixture for 1.5 hours (Fig. 42.1)....
This is the Wittig reaction (synthesis to make E and Z stilbenes) This is for the...
This is the Wittig reaction (synthesis to make E and Z
stilbenes)
This is for the Wittig Lab of Organic Chemistry 2. Please answer
to all 3 questions with explanations as simple and specific and
possible to understand.
(CgHs)3РСH,CoH,Cr, NaOH H CH2CI2 What happens when NaOH is added to the reaction mixture? Draw the species formed and any reasonable resonance form(s). 10 pts 1. Once the reaction mixture is added to a test tube and dichloromethane (DCM) is added, why...
This is the Wittig reaction (synthesis to make E and Z stilbenes) This is for the...
This is the Wittig reaction (synthesis to make E and Z
stilbenes)
This is for the Wittig Lab of Organic Chemistry 2. Please answer
to all 3 questions with explanations as simple and specific and
possible to understand.
(CgHs)3РСH,CoH,Cr, NaOH H CH2CI2 What happens when NaOH is added to the reaction mixture? Draw the species formed and any reasonable resonance form(s). 10 pts 1. Once the reaction mixture is added to a test tube and dichloromethane (DCM) is added, why...
1. The Wittig reaction is useful to replace carbonyl groups with alkenes. Use the following reaction...
1. The Wittig reaction is useful to replace carbonyl groups with alkenes. Use the following reaction scheme, and the reaction's procedure to answer the questions: Dissolve 0.97 mmol of Wittig reagent and 0.90 mmol of aldehyde with ImL DCM Add 0.5 mL conc. NaOH & stirr for 20 mins Transfer the crude to a test tube, add 3 mL of water Extract with 2 portions of DCM, transfer organic layers to another tube Add enough MgSO4 to cover the bottom...
Questions on Procedures: 1. Write the reaction of the synthesis of tert-amyl chloride. 2. Based on...
Questions on Procedures: 1. Write the reaction of the synthesis of tert-amyl chloride. 2. Based on the densities of tert-amyl chloride and water, which is the tert-amyl chloride layer? 3. Why is it necessary to wash the crude tert-amyl chloride with 5% NaHCO,? 4. What is the purpose of treating the organic layer with anhydrous calcium chloride pellets? Simple Distill Simple Distillation Results: I collected 12.02 mL of tert-amyl chloride 5. Calculate the percent yield of tert-amyl chloride. Conclusion: 6....
what is the purpose of each of the extractions (washings) the crude product? In other word,...
what is the purpose of each of the extractions (washings) the crude product? In other word, what is removed upon washing with (a) water (b) sodium bicarbonate and finally (c) ammonium chloride. The experiment I did is amide synthesis from carboxylic acid and amine and using EDCl with catalyst DMAP and DMF. By doing the extraction. I dilute my reaction mixture with 40 ml of water, pour the contents into separatory funnel. Then add approximately 20 mL of ethyl acetate...
Post Lab Questions what is the purpose of glacial acetic acid in this reaction? (5 points)...
Post Lab Questions what is the purpose of glacial acetic acid in this reaction? (5 points) 2. How does KI-starch paper work? What is the source of the dark color 3. What is the purpose of adding saturated aqueous sodium bisult What reaction is taking place? Write out the bar my saturated aqueous sodium bisulfite to the reaction mixture? is taking place? Write out the balanced equation for this reaction. Why do you e kl-starch paper test after adding the...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction solvent. B) purify an organic liquid. C) separate the components of a liquid mixture. D) purify an organic solid. E) all of the above 1. What is a limiting reactant? A) reactant with the smallest initial mass B) reactant with the largest initial mass C) reactant that is completely consumed during a chemical reaction D) reactant that is NOT completely consumed during a chemical...
9 b) the reaction between aqueous solutions of cobalt(III) nitrate and sodium hydroxide to form aqueous sodium nitra...
9
b) the reaction between aqueous solutions of cobalt(III) nitrate and sodium hydroxide to form aqueous sodium nitrate and solid cobalt(III) hydroxide. c) the reaction between solid zinc and aqueous hydrochloric acid in a single replacement reaction. d) classify the reactions in (a) and (b). 9. Hydrogen sulfide, given off by decaying organic matter, is converted to sulfur dioxide in the atmosphere by the reaction: 2 H S(g) + 30 (g) 2 SO (g) + 2 H2O() a) How many...
Based on the Wittig Reaction exp. below, please answer a) and
b). In b) you can disregard the part about the IR, just please
interpret and assign protons, shift values, which protons are for
which groups, etc on the HNMR. The % yield was 34%, and MP was
lower than expected (to assist with answering part a). This should
be all the information you need to answer the question.
HNMR
Discuss the percentage yield of the reaction. Explain and provide...
This procedure was conducted for diethyl n-butylmalonate. The
question is: What is the purpose of the tricaprylmethylammonium
chloride and why is it used in a nomstoichiometric?
Chapter 42 Malonic Ester of a Barbiturate 541 Into a 5-mL long-necked, round-bottomed flask, weigh 40 mg of tricaprylmethylammonium chloride, 400 mg of diethyl malonate, 350 mg of 1-bromobutane, and 415 mg of anhydrous potassium carbonate. Attach the empty distillation column as an air condenser and reflux the mixture for 1.5 hours (Fig. 42.1)....
This is the Wittig reaction (synthesis to make E and Z
stilbenes)
This is for the Wittig Lab of Organic Chemistry 2. Please answer
to all 3 questions with explanations as simple and specific and
possible to understand.
(CgHs)3РСH,CoH,Cr, NaOH H CH2CI2 What happens when NaOH is added to the reaction mixture? Draw the species formed and any reasonable resonance form(s). 10 pts 1. Once the reaction mixture is added to a test tube and dichloromethane (DCM) is added, why...
This is the Wittig reaction (synthesis to make E and Z
stilbenes)
This is for the Wittig Lab of Organic Chemistry 2. Please answer
to all 3 questions with explanations as simple and specific and
possible to understand.
(CgHs)3РСH,CoH,Cr, NaOH H CH2CI2 What happens when NaOH is added to the reaction mixture? Draw the species formed and any reasonable resonance form(s). 10 pts 1. Once the reaction mixture is added to a test tube and dichloromethane (DCM) is added, why...
1. The Wittig reaction is useful to replace carbonyl groups with alkenes. Use the following reaction scheme, and the reaction's procedure to answer the questions: Dissolve 0.97 mmol of Wittig reagent and 0.90 mmol of aldehyde with ImL DCM Add 0.5 mL conc. NaOH & stirr for 20 mins Transfer the crude to a test tube, add 3 mL of water Extract with 2 portions of DCM, transfer organic layers to another tube Add enough MgSO4 to cover the bottom...
Questions on Procedures: 1. Write the reaction of the synthesis of tert-amyl chloride. 2. Based on the densities of tert-amyl chloride and water, which is the tert-amyl chloride layer? 3. Why is it necessary to wash the crude tert-amyl chloride with 5% NaHCO,? 4. What is the purpose of treating the organic layer with anhydrous calcium chloride pellets? Simple Distill Simple Distillation Results: I collected 12.02 mL of tert-amyl chloride 5. Calculate the percent yield of tert-amyl chloride. Conclusion: 6....
Post Lab Questions what is the purpose of glacial acetic acid in this reaction? (5 points) 2. How does KI-starch paper work? What is the source of the dark color 3. What is the purpose of adding saturated aqueous sodium bisult What reaction is taking place? Write out the bar my saturated aqueous sodium bisulfite to the reaction mixture? is taking place? Write out the balanced equation for this reaction. Why do you e kl-starch paper test after adding the...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction solvent. B) purify an organic liquid. C) separate the components of a liquid mixture. D) purify an organic solid. E) all of the above 1. What is a limiting reactant? A) reactant with the smallest initial mass B) reactant with the largest initial mass C) reactant that is completely consumed during a chemical reaction D) reactant that is NOT completely consumed during a chemical...
9
b) the reaction between aqueous solutions of cobalt(III) nitrate and sodium hydroxide to form aqueous sodium nitrate and solid cobalt(III) hydroxide. c) the reaction between solid zinc and aqueous hydrochloric acid in a single replacement reaction. d) classify the reactions in (a) and (b). 9. Hydrogen sulfide, given off by decaying organic matter, is converted to sulfur dioxide in the atmosphere by the reaction: 2 H S(g) + 30 (g) 2 SO (g) + 2 H2O() a) How many...
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