why does formaldehyde has no alpha hydrogen atom attached to the carbonyl group and how does...
why does formaldehyde has no alpha hydrogen atom attached to the carbonyl group and how does aldol condensation mechanism works?
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why does formaldehyde has no alpha hydrogen atom
attached to the carbonyl group and how does...
5. In an aldol condensation why must there be an H atom on the alpha carbon...
5. In an aldol condensation why must there be an H atom on the alpha carbon adjacent to a carbonyl group of one of the reacting compounds? (3 marks)
Aldol Condensation (multi-part question) 1. a. Why does mixing of solid 3,4-dimethoxybenzaldehyde and solid 1-indanone result...
Aldol Condensation (multi-part question) 1. a. Why does mixing of solid 3,4-dimethoxybenzaldehyde and solid 1-indanone result a liquid solution? b. Why is the condensation (dehydrated) product rather than the aldol addition (hydrated) product obtained in this experiment? (What makes the condensation product exceptionally stable?) c. Why does the enolate ion of an aromatic ketone react faster with an aldehyde group (producing a crossed-aldol reaction) than with the carbonyl group of another molecule of ketone?
5) Why is the Aldol reaction often called an Aldol condensation? A) The initially formed b-hydroxy...
5) Why is the Aldol reaction often called an Aldol condensation? A) The initially formed b-hydroxy carbonyl compound loses water B) The initially formed b-hydroxy carbonvl compound loses an oxygen atom. C) The initially formed b-hydroxy carbonyl compound loses a hydrogen atom D) The initially formed b-hydroxy carbonyl compound loses a hydroxyl group. 6) When is a crossed Aldol reaction said to be synthetically useful? A) When both carbonyl compounds have a hydrogens B) When one carbonyl compound has no...
Why are aldehydes and ketones soluble in concentrated Sulfuric acid? How does a carbonyl group impact...
Why are aldehydes and ketones soluble in concentrated Sulfuric acid? How does a carbonyl group impact solubility??
POST-LAB GUIDE QUESTIONS 1) How does formaldehyde act as disinfectant or as a preservative of biological...
POST-LAB GUIDE QUESTIONS 1) How does formaldehyde act as disinfectant or as a preservative of biological specimens? 2) What are the uses of urotropine? Give its structure. Explain the action of each. 3) is the use of HCHO as a food preservative permitted by law? Explain. 4) Give the practical use of the reduction of AgNO3 by means of aldehydes. 5) What is paraldehyde? Give one use of paraldehyde in medicine, 6) Give the commercial use of acetone. 7) What...
How to solve question 2 to question 5. 2. Why does the mixed aldol condensation, producing...
How to solve question 2 to question 5.
2. Why does the mixed aldol condensation, producing benzalacetophenone is the main reaction in this experiment and NOT both other possible reactions; acetophenone condensation and Cannizzaro benzaladehyde reaction? 3. Propose a reason to explain the statement that the trans-benzalacctophenone isomer is the major product in aldol condensation 4, Explain why the main product from the bromine addition to the trans-acetophenone is crythro-dibromide 5. Write a mechanism for the addition of aniline to...
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues....
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues. Then, hydrogen bonds are formed between the oxygen atom in amino acid along the the carbonyl group in the first amino acid and the hydrogen atom in the amine group of the chain. Select the correct answer below: third second fourth fifth FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
We saw in this experiment that an ester group with the carbonyl carbon attached to the...
We saw in this experiment that an ester group with the carbonyl carbon attached to the benzene ring serves as a meta-director, resulting in methyl Meta-nitrobenzoate as the major product of the reaction. Given that a methoxy (-OCH_3) group attached to the benzene ring serves as an orthopara director, draw the major products of the reaction shown below. Use your pre-lab lecture notes to answer this question. Explain using the resonance structures (referred to as the "sigma complex") why the...
In #5 (carboxylic acid), why doesn't the AlH4(-) attack the carbonyl carbon and proceed to the...
In #5 (carboxylic acid), why doesn't the AlH4(-) attack the
carbonyl carbon and proceed to the tetrahedral intermediate...why
does it instead attack the hydroxy group to form O-AlH3 and then
does an H(-) attack on the carbonyl carbon?
On the other hand, in #1 (ester), the ALH4(-) attacks the
carbonyl carbon...tetrahedral intermediate, OCH3 leaving group,
etc. (this is the mechanism I expected #5 to be)
03 O-Al H-Al-H H-Al-H H-Al-H OH
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...
5. In an aldol condensation why must there be an H atom on the alpha carbon adjacent to a carbonyl group of one of the reacting compounds? (3 marks)
5) Why is the Aldol reaction often called an Aldol condensation? A) The initially formed b-hydroxy carbonyl compound loses water B) The initially formed b-hydroxy carbonvl compound loses an oxygen atom. C) The initially formed b-hydroxy carbonyl compound loses a hydrogen atom D) The initially formed b-hydroxy carbonyl compound loses a hydroxyl group. 6) When is a crossed Aldol reaction said to be synthetically useful? A) When both carbonyl compounds have a hydrogens B) When one carbonyl compound has no...
POST-LAB GUIDE QUESTIONS 1) How does formaldehyde act as disinfectant or as a preservative of biological specimens? 2) What are the uses of urotropine? Give its structure. Explain the action of each. 3) is the use of HCHO as a food preservative permitted by law? Explain. 4) Give the practical use of the reduction of AgNO3 by means of aldehydes. 5) What is paraldehyde? Give one use of paraldehyde in medicine, 6) Give the commercial use of acetone. 7) What...
How to solve question 2 to question 5.
2. Why does the mixed aldol condensation, producing benzalacetophenone is the main reaction in this experiment and NOT both other possible reactions; acetophenone condensation and Cannizzaro benzaladehyde reaction? 3. Propose a reason to explain the statement that the trans-benzalacctophenone isomer is the major product in aldol condensation 4, Explain why the main product from the bromine addition to the trans-acetophenone is crythro-dibromide 5. Write a mechanism for the addition of aniline to...
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues. Then, hydrogen bonds are formed between the oxygen atom in amino acid along the the carbonyl group in the first amino acid and the hydrogen atom in the amine group of the chain. Select the correct answer below: third second fourth fifth FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
We saw in this experiment that an ester group with the carbonyl carbon attached to the benzene ring serves as a meta-director, resulting in methyl Meta-nitrobenzoate as the major product of the reaction. Given that a methoxy (-OCH_3) group attached to the benzene ring serves as an orthopara director, draw the major products of the reaction shown below. Use your pre-lab lecture notes to answer this question. Explain using the resonance structures (referred to as the "sigma complex") why the...
In #5 (carboxylic acid), why doesn't the AlH4(-) attack the
carbonyl carbon and proceed to the tetrahedral intermediate...why
does it instead attack the hydroxy group to form O-AlH3 and then
does an H(-) attack on the carbonyl carbon?
On the other hand, in #1 (ester), the ALH4(-) attacks the
carbonyl carbon...tetrahedral intermediate, OCH3 leaving group,
etc. (this is the mechanism I expected #5 to be)
03 O-Al H-Al-H H-Al-H H-Al-H OH
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...
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