In what situation can the yeild of a single crossed Aldol product be increased? a) The...
In what situation can the yeild of a single crossed Aldol product be increased?
a) The nucleophilic carbonyl component is relatively hindered and is used in limited amount
b) The nucleophilic carbonyl component is relatively unhindered and is used in excess
c) The electophilic carbonyl carbon component is relatively hindered and is used in limited amount
d) The electophilic carbonyl component is relatively unhindered and is used in excess
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In what situation can the yeild of a single crossed Aldol
product be increased?
a) The...
Consider the following crossed aldol condensation. Which statement explains why a single cross condensation product is...
Consider the following crossed aldol condensation. Which statement explains why a single cross condensation product is formed? 2,2-dimethylcyclohexanone "CH₃ H₂C, CH, H NaOCH.CH H3C thanol benzaldehyde 2,2-Dimethylcyclohexanone has only one alpha carbon which can form an enolate. Benzaldehyde has no hydrogens attached to the alpha carbon which eliminates the self-condenstation reaction. 2,2-Dimethylcyclohexanone is sterically hindered which limits the self-condenstation reaction. All of the above
23.4 What are the precursors for the mixed aldol product? 23.1 Predict the aldol reaction product....
23.4 What are the precursors for the mixed aldol product? 23.1 Predict the aldol reaction product. The new C-C bond is formed between the a-carbon of one molecule and carbonyl of the other. 23.6 Give the product of the Claisen reaction shown below. اعمال 1. NaOEt OEt 2. H20+ connectivity = C-carbon of one to carbonyl of the other (with loss of the leaving group). 23.7 Identify the Claisen precursor. NaOEt OEt ale new bond was formed between a-carbon of...
Which of the following statements about the Aldol reaction is correct. Select all that apply. The...
Which of the following statements about the Aldol reaction is correct. Select all that apply. The aldol condensation reaction requires only a catalytic amount of base to form the a, -unsaturated carbonyl product In an Aldol reaction, the enolate is the electrophile that reacts with a neutral carbonyl nucleophile. Reacting 1 equivalent of LDA (lithium diisopropylamide) with 3-pentanone, the enolate will be formed quantitatively. Two equivalents of a ketone can be reacted with NaOH to form a B-hydroxycarbonyl product. Aldol...
Determine the theoretical and percent yield for this lab Wednerdouy 13 CH 4521-8: Crossed Aldol Condensation:...
Determine the theoretical and percent yield for this lab
Wednerdouy 13 CH 4521-8: Crossed Aldol Condensation: Synthesls of trans-p-anisalacetophenone Ketones that contain an a-hydrogen (a hydrogen on the C right next door to the carbonyl group) can be tabilized via keto-enol tautomerization, or through the loss of the a-hydrogen to form an enolate anion. enolate anion Enolate ions actas nudbophiles and are considerable more reactive than tois. The enolate on i the subject of today's experiment. The formation of an...
Which of the following pairs of compounds would give the most successful crossed aldol condensation when...
Which of the following pairs of compounds would give the most successful crossed aldol condensation when combined in the presence of a strong base? (Note: by "successful" we mean that the reaction 1) actually works, and 2) gives only a single aldol condensation product.) Pair A: and Bu Ph H н Pair B: and Ph н н Pair C: and OMe Ph and Pair D: Pair C Pair A Pair D Pair B
Product was formed successfully based on the exp. below (about 85% yield), please interpret/discuss HNMR/IR in...
Product was formed successfully based on the exp. below (about
85% yield), please interpret/discuss HNMR/IR in as much detail as
possible and assign peaks on HNMR (which peak represents which
protons of which group, etc). Note: I already know how you
determine the formation of the product so you can skip that part of
part b).
Based on this exp:
Discuss the IR spectrum and what is the peak in IR that you can see for a specific functional group...
7. What two molecules could be used to make the following molecules using crossed aldol reaction....
7. What two molecules could be used to make the following molecules using crossed aldol reaction. ook OH 8a. There are 4 alpha-carbons in this molecule. Which alpha carbon(s) is/are the most reactive? What is the product if NaOH and heat are used? a 8b. What is the scientist name whom the above reaction is named after? 9. Why does the base (used to proton transfer) need match the initial reactant in the Claisen Condensation? 10. Malonic ester synthesis questions...
7. What two molecules could be used to make the following molecules using crossed aldol reaction....
7. What two molecules could be used to make the following molecules using crossed aldol reaction. OH 8a. There are 4 alpha-carbons in this molecule. Which alpha carbon(s) is/are the most reactive? What is the product if NaOH and heat are used? 8b. What is the scientist name whom the above reaction is named after? 9. Why does the base (used to proton transfer) need match the initial reactant in the Claisen Condensation? 10. Malonic ester synthesis questions - Show...
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete...
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete aldol reactions using two different aldehydes or ketones.) Reagents: acetyl aldehyde + p-chlorobenzaldehyde (no alpha hydrogen) + NaOH a strong base + H20 and heat.) HOA o oo QUESTION 34 2 points (518.7) Which compound, in a reaction with the ketone below, would produce the fewest side products? (Identify which aldol reactions will proceed in high yield). Reagents: starting material acetone + (1) NaOH...
7. What two molecules could be used to make the following molecules using crossed aldol reaction....
7. What two molecules could be used to make the following molecules using crossed aldol reaction. O ook OH 8a. There are 4 alpha-carbons in this molecule. Which alpha carbon(s) is/are the most reactive? What is the product if NaOH and heat are used? 8b. What is the scientist name whom the above reaction is named after? 9. Why does the base (used to proton transfer) need match the initial reactant in the Claisen Condensation? 10. Malonic ester synthesis questions...
Consider the following crossed aldol condensation. Which statement explains why a single cross condensation product is formed? 2,2-dimethylcyclohexanone "CH₃ H₂C, CH, H NaOCH.CH H3C thanol benzaldehyde 2,2-Dimethylcyclohexanone has only one alpha carbon which can form an enolate. Benzaldehyde has no hydrogens attached to the alpha carbon which eliminates the self-condenstation reaction. 2,2-Dimethylcyclohexanone is sterically hindered which limits the self-condenstation reaction. All of the above
23.4 What are the precursors for the mixed aldol product? 23.1 Predict the aldol reaction product. The new C-C bond is formed between the a-carbon of one molecule and carbonyl of the other. 23.6 Give the product of the Claisen reaction shown below. اعمال 1. NaOEt OEt 2. H20+ connectivity = C-carbon of one to carbonyl of the other (with loss of the leaving group). 23.7 Identify the Claisen precursor. NaOEt OEt ale new bond was formed between a-carbon of...
Which of the following statements about the Aldol reaction is correct. Select all that apply. The aldol condensation reaction requires only a catalytic amount of base to form the a, -unsaturated carbonyl product In an Aldol reaction, the enolate is the electrophile that reacts with a neutral carbonyl nucleophile. Reacting 1 equivalent of LDA (lithium diisopropylamide) with 3-pentanone, the enolate will be formed quantitatively. Two equivalents of a ketone can be reacted with NaOH to form a B-hydroxycarbonyl product. Aldol...
Determine the theoretical and percent yield for this lab
Wednerdouy 13 CH 4521-8: Crossed Aldol Condensation: Synthesls of trans-p-anisalacetophenone Ketones that contain an a-hydrogen (a hydrogen on the C right next door to the carbonyl group) can be tabilized via keto-enol tautomerization, or through the loss of the a-hydrogen to form an enolate anion. enolate anion Enolate ions actas nudbophiles and are considerable more reactive than tois. The enolate on i the subject of today's experiment. The formation of an...
Which of the following pairs of compounds would give the most successful crossed aldol condensation when combined in the presence of a strong base? (Note: by "successful" we mean that the reaction 1) actually works, and 2) gives only a single aldol condensation product.) Pair A: and Bu Ph H н Pair B: and Ph н н Pair C: and OMe Ph and Pair D: Pair C Pair A Pair D Pair B
Product was formed successfully based on the exp. below (about
85% yield), please interpret/discuss HNMR/IR in as much detail as
possible and assign peaks on HNMR (which peak represents which
protons of which group, etc). Note: I already know how you
determine the formation of the product so you can skip that part of
part b).
Based on this exp:
Discuss the IR spectrum and what is the peak in IR that you can see for a specific functional group...
7. What two molecules could be used to make the following molecules using crossed aldol reaction. ook OH 8a. There are 4 alpha-carbons in this molecule. Which alpha carbon(s) is/are the most reactive? What is the product if NaOH and heat are used? a 8b. What is the scientist name whom the above reaction is named after? 9. Why does the base (used to proton transfer) need match the initial reactant in the Claisen Condensation? 10. Malonic ester synthesis questions...
7. What two molecules could be used to make the following molecules using crossed aldol reaction. OH 8a. There are 4 alpha-carbons in this molecule. Which alpha carbon(s) is/are the most reactive? What is the product if NaOH and heat are used? 8b. What is the scientist name whom the above reaction is named after? 9. Why does the base (used to proton transfer) need match the initial reactant in the Claisen Condensation? 10. Malonic ester synthesis questions - Show...
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete aldol reactions using two different aldehydes or ketones.) Reagents: acetyl aldehyde + p-chlorobenzaldehyde (no alpha hydrogen) + NaOH a strong base + H20 and heat.) HOA o oo QUESTION 34 2 points (518.7) Which compound, in a reaction with the ketone below, would produce the fewest side products? (Identify which aldol reactions will proceed in high yield). Reagents: starting material acetone + (1) NaOH...
7. What two molecules could be used to make the following molecules using crossed aldol reaction. O ook OH 8a. There are 4 alpha-carbons in this molecule. Which alpha carbon(s) is/are the most reactive? What is the product if NaOH and heat are used? 8b. What is the scientist name whom the above reaction is named after? 9. Why does the base (used to proton transfer) need match the initial reactant in the Claisen Condensation? 10. Malonic ester synthesis questions...
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