Homework Answers
The fundamental transformation in aldol condensation reaction is a dimerization of an aldehyde (or ketone) to a beta-hydroxy aldehyde (or ketone) by alpha C–H addition of one reactant molecule to the carbonyl group of a second reactant molecule.
The answers are:
c) diphenyl ketone
d)2,3 dimethyl-1-phenyl-1-propanone
The aldol condensation reaction will not take place because of lack of alpha H
Add Answer to:
Which of the compounds below have no alpha- hydrogens? What does this mean for the aldol...
QUESTION 1 Which of the following will not undergo an aldol condensation reaction? butanal C 2-methylbutanal...
QUESTION 1 Which of the following will not undergo an aldol condensation reaction? butanal C 2-methylbutanal C 2,2-dimethylbutanal 3,3-dimethyl-2-butanone QUESTION 2 Which of the following constitutes a difference between an aldol and a Claisen condensation? basic conditions Ctetrahedral intermediate Cenolate ion formation protonation of the intermediate QUESTION 3 The product of an aldol condensation reaction is generally favored if Can unsymmetrical ketone and aldehyde are used Can unsymmetrical ester and ketone are used Cone of the carbonyl partners contains no...
Which of the following compounds is LEAST likely to undergo a mixed aldol condensation with 2-propanone...
Which of the following compounds is LEAST likely to undergo a mixed aldol condensation with 2-propanone in high yield. OA HCHO о (сHз) ссно осHзсно o Pһсно 1. PhCOCI, AICI: 2. KMnO4, H20 3. Brz, FeBry COH What is the final product in the following quence? 0000
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
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in...
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in the presence of sodium hydroxide Provide the expected major MIXED aldol condensation product for this reaction (can exist as E or Z isomer so you can draw either) b) Would you have to heat the reaction mixture in order for the reaction to form the aldol condensation product? Why or wh y not? 2) Consider the mixed aldol condensation reaction of 3,3-dimethyl-2-butanone (shown in...
What reagent loses the alpha hydrogen to become the nucleophilic carbanion? Aldol Reaction: Synthesis of trans,...
What reagent loses the alpha hydrogen to become the nucleophilic
carbanion?
Aldol Reaction: Synthesis of trans, trans-1,5-Diphenyl-1,4. pentadien-3-one (Dibenzalacetone) In the present experiment, you will be performing a practical Aldol reaction using benzaldehyde acetone. The final condensed Aldol product (trans, trans-1,5-diphenyl-1,4-pentadien-3-one) an extensive conjugation system The first condensed Aldol benzaldehyde and acetone. The final condensed Aldol product will form when the initial Aldol product reacts with benzaldehyde resulting in 2:1 mole ratio of benzaldehyde and acetone. Addition Aldol products are...
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...
1. Which of the compounds listed below would produce the following aldol condensation product? 2. Which...
1. Which of the compounds listed below would produce
the following aldol condensation product?
2. Which is not a product of the claisen condensation
of ethyl ethanoate and ethyl butanoate?
3. A claisen-schmidt reaction shown below, is an
important step in the commercial synthesis of Vitamin A: what type
of reaction is the claisen- Schmidt?
4. Which of the following statements is true about the
anion formed from the reaction of diethyl malonate with sodium
ethoxide?
please help
A. cycloh...
Question 2 1 pts Which of the following pairs of compounds would give the most successful...
Question 2 1 pts 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.) masa - marce nie Paic: one and Love Pair o: ¿ and i Оме O
Question 1 Match each reagent with its role in aldol condensation reaction. Not yet answered D-anisaldehyde...
Question 1 Match each reagent with its role in aldol condensation reaction. Not yet answered D-anisaldehyde Choose... Points out of 10.00 dium hydroxide Choose... P Flag question acetophenone Choose... ethanol Choose... Question 2 Not yet answered To purify the aldol condensation product you will have to recrystallize it from methanol. Give the steps in recrystallization procedure the appropriate order numbering. Points out of 10.00 The compound is kept under vacuum for 10 min Choose... + P Flag question The solution...
identify which compound is more acidic and explain your choice. or each of the following compounds,...
identify which compound is more acidic and explain your choice. or each of the following compounds, Make sure you include structures of these which compounds in your answers ounds, 1. F (e) 24-Dimethy-3,5-hepanedione or 4, 4-Dimethy)-3,5-heptanedione (b) 1.2-Cyclopentanedione or 1,3-cyclopentanedione 2. When 2-hepten-4-one is treated with LDA, a proton is removed from one of the gamma (z) positions. identily which gamma position is deprotonated, and explain why the y proton is the most acidie proton in the compound. 3. Rank...
QUESTION 1 Which of the following will not undergo an aldol condensation reaction? butanal C 2-methylbutanal C 2,2-dimethylbutanal 3,3-dimethyl-2-butanone QUESTION 2 Which of the following constitutes a difference between an aldol and a Claisen condensation? basic conditions Ctetrahedral intermediate Cenolate ion formation protonation of the intermediate QUESTION 3 The product of an aldol condensation reaction is generally favored if Can unsymmetrical ketone and aldehyde are used Can unsymmetrical ester and ketone are used Cone of the carbonyl partners contains no...
Which of the following compounds is LEAST likely to undergo a mixed aldol condensation with 2-propanone in high yield. OA HCHO о (сHз) ссно осHзсно o Pһсно 1. PhCOCI, AICI: 2. KMnO4, H20 3. Brz, FeBry COH What is the final product in the following quence? 0000
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
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in the presence of sodium hydroxide Provide the expected major MIXED aldol condensation product for this reaction (can exist as E or Z isomer so you can draw either) b) Would you have to heat the reaction mixture in order for the reaction to form the aldol condensation product? Why or wh y not? 2) Consider the mixed aldol condensation reaction of 3,3-dimethyl-2-butanone (shown in...
What reagent loses the alpha hydrogen to become the nucleophilic
carbanion?
Aldol Reaction: Synthesis of trans, trans-1,5-Diphenyl-1,4. pentadien-3-one (Dibenzalacetone) In the present experiment, you will be performing a practical Aldol reaction using benzaldehyde acetone. The final condensed Aldol product (trans, trans-1,5-diphenyl-1,4-pentadien-3-one) an extensive conjugation system The first condensed Aldol benzaldehyde and acetone. The final condensed Aldol product will form when the initial Aldol product reacts with benzaldehyde resulting in 2:1 mole ratio of benzaldehyde and acetone. Addition Aldol products are...
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...
1. Which of the compounds listed below would produce
the following aldol condensation product?
2. Which is not a product of the claisen condensation
of ethyl ethanoate and ethyl butanoate?
3. A claisen-schmidt reaction shown below, is an
important step in the commercial synthesis of Vitamin A: what type
of reaction is the claisen- Schmidt?
4. Which of the following statements is true about the
anion formed from the reaction of diethyl malonate with sodium
ethoxide?
please help
A. cycloh...
Question 2 1 pts 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.) masa - marce nie Paic: one and Love Pair o: ¿ and i Оме O
Question 1 Match each reagent with its role in aldol condensation reaction. Not yet answered D-anisaldehyde Choose... Points out of 10.00 dium hydroxide Choose... P Flag question acetophenone Choose... ethanol Choose... Question 2 Not yet answered To purify the aldol condensation product you will have to recrystallize it from methanol. Give the steps in recrystallization procedure the appropriate order numbering. Points out of 10.00 The compound is kept under vacuum for 10 min Choose... + P Flag question The solution...
identify which compound is more acidic and explain your choice. or each of the following compounds, Make sure you include structures of these which compounds in your answers ounds, 1. F (e) 24-Dimethy-3,5-hepanedione or 4, 4-Dimethy)-3,5-heptanedione (b) 1.2-Cyclopentanedione or 1,3-cyclopentanedione 2. When 2-hepten-4-one is treated with LDA, a proton is removed from one of the gamma (z) positions. identily which gamma position is deprotonated, and explain why the y proton is the most acidie proton in the compound. 3. Rank...
Most questions answered within 3 hours.
-
It is possible to iterate through an array quickly and easily
using a loop?
asked 1 minute ago -
Please write as a short answer
You have heartburn and a two hour working session on...
asked 2 minutes ago -
Please solve with excel and mention the excel function.
Thanks
Kevin deposits $10,000 in a savings...
asked 4 minutes ago -
Which Special Journal would the following transaction be
journalized in?
Sold merchandise on account to Customer...
asked 16 minutes ago -
Assuming 100% dissociation, calculate the freezing point (?fTf)
and boiling point (?bTb) of 1.45 ? K3PO4(aq)1.45...
asked 18 minutes ago -
An inflated helium balloon with a volume of 0.35L at
sea level (1.0 atm) was allowed...
asked 20 minutes ago -
Python 3.0 Please
Write a function that takes, as arguments, a binary string, a
list of...
asked 48 minutes ago -
(a) Calculate the momentum of a 2150 kg elephant charging a
hunter at a speed of...
asked 36 minutes ago -
all the following is an example of a fixed cost except: any cost
that changes in...
asked 38 minutes ago -
Briefly describe the changes in pupil diameter that occur with
changes in light intensity or distance...
asked 37 minutes ago -
A small sample from a vial of phenol melts at 39-40 °C. A larger
sample from...
asked 40 minutes ago -
Draw a δ-lysine amino acid and label all the carbons (alpha,
beta, gamma, etc.)
asked 53 minutes ago