Homework Answers
When the nucleophile carbonyl group and electrophilic carbonyl group are different, the reaction is called a crossed aldol reaction.
Condition for aldol reaction
1) requirement of alpha carbon whose proton can be abstracted.
When different carbonyl groups are reacted and one out of the
two does not have a alpha hydrogen present such as aromatic
Aldehyde which can only act as electrophile. Hence will only give
one single product.
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Product ??? ??? ??? ??? ??? 3) The reaction you're performing is formerly called a cross...
Rheosmin is a saturated ketone obtained from an alpha,beta-unsaturated ketone (a crossed aldol condensation product) which...
Rheosmin is a saturated ketone obtained from an
alpha,beta-unsaturated ketone (a crossed aldol condensation
product) which is capable of undergoing hydrogenation to yield a
saturated ketone (Rheosmin). Using this technique, identify the
reagents needed to prepare Rheosmin via crossed aldol reaction.
Rheosmin 4-(4-hydroxyphenyl)butan-2-one
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...
There are several variations of the Aldol reaction. Which of the following types of reactants leads...
There are several variations of the Aldol reaction. Which of the following types of reactants leads to only one possible product with the Aldol condensation reaction? a. Two different aldehydes with alpha-hydrogens are able to form a single aldol condensation product. b. Two different ketones with alpha-hydrogens are able to form a single aldol condensation product. c. Any aldehyde and ketone mixed together can react to form a single condensation product. d. Any pair of aldehyde or ketone reactants where...
Experimental Outline In its simplest form, the aldol condensation is a self-addition involving tw...
Organic Chemistry 2
Experimental Outline In its simplest form, the aldol condensation is a self-addition involving two molecules of the same aldehyde or ketone, in the presence of a base, and results in the formation of a new carbon-carbon bond joining the carbonyl carbon of one molecule to the a-position of the second. In many cases - if the reaction conditions aren't sufficiently mild - the initially formed aldol product reacts further in an elimination reaction to give what is...
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
1. What is the tautomer, of the functional group 'ketone', called: - 2. Predict the product(s)...
1. What is the tautomer, of the functional group 'ketone', called: - 2. Predict the product(s) of the following reaction and assign the proper equilibrium arrows: :N: H H 3. Label major and minor products. Then explain what causes the major to be the major. Bry, H x & Br Br 4. Draw the aldol product and the aldol condensation product of the following molecule: aldol aldol condensation H 5. What single molecule will make the first molecule? What single...
1. What is the tautomer, of the functional group 'ketone', called: - 2. Predict the product(s)...
1. What is the tautomer, of the functional group 'ketone', called: - 2. Predict the product(s) of the following reaction and assign the proper equilibrium arrows: :N: H H 3. Label major and minor products. Then explain what causes the major to be the major. Bry, H x & Br Br 4. Draw the aldol product and the aldol condensation product of the following molecule: aldol aldol condensation H 5. What single molecule will make the first molecule? What single...
Section 4. Total points 26 1. Give one example of each of the following name reactions....
Section 4. Total points 26 1. Give one example of each of the following name reactions. For each reaction, you MUST INCLUDE: i) IUPAC Name of the reactant ii) IUPAC Name of the product iii) Reagents and reaction conditions (4points X 4 = 16 points) a. H.V.Z reaction b. Crossed aldol reaction between an aldehyde and a ketone 2-Propanone Benzaldehple c. Michael reaction between an a.ß unsaturated aldehyde and a B-diketone. d. Dieckman Condensation to have a cyclic product with...
Make sure the reaction table described above is completed in your notebook.
Prelab questions:1. Make sure the reaction table described above is completed in your notebook.2. Two benzaldehyde molecules combine with one acetone molecule in this aldol reaction. If someone uses 5.0 mL of benzaldehyde and 2.5 mL of acetone to try to improve the yield of product, is this the correct ratio of molecules so that there is no excess? Why or why not?The Aldol Reaction: Synthesis of DibenzalacetonePurpose: Introduce the student to the hands-on chemistry of carbonyl condensations.Warning: Dispose of...
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...
Rheosmin is a saturated ketone obtained from an
alpha,beta-unsaturated ketone (a crossed aldol condensation
product) which is capable of undergoing hydrogenation to yield a
saturated ketone (Rheosmin). Using this technique, identify the
reagents needed to prepare Rheosmin via crossed aldol reaction.
Rheosmin 4-(4-hydroxyphenyl)butan-2-one
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...
There are several variations of the Aldol reaction. Which of the following types of reactants leads to only one possible product with the Aldol condensation reaction? a. Two different aldehydes with alpha-hydrogens are able to form a single aldol condensation product. b. Two different ketones with alpha-hydrogens are able to form a single aldol condensation product. c. Any aldehyde and ketone mixed together can react to form a single condensation product. d. Any pair of aldehyde or ketone reactants where...
Organic Chemistry 2
Experimental Outline In its simplest form, the aldol condensation is a self-addition involving two molecules of the same aldehyde or ketone, in the presence of a base, and results in the formation of a new carbon-carbon bond joining the carbonyl carbon of one molecule to the a-position of the second. In many cases - if the reaction conditions aren't sufficiently mild - the initially formed aldol product reacts further in an elimination reaction to give what 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
1. What is the tautomer, of the functional group 'ketone', called: - 2. Predict the product(s) of the following reaction and assign the proper equilibrium arrows: :N: H H 3. Label major and minor products. Then explain what causes the major to be the major. Bry, H x & Br Br 4. Draw the aldol product and the aldol condensation product of the following molecule: aldol aldol condensation H 5. What single molecule will make the first molecule? What single...
1. What is the tautomer, of the functional group 'ketone', called: - 2. Predict the product(s) of the following reaction and assign the proper equilibrium arrows: :N: H H 3. Label major and minor products. Then explain what causes the major to be the major. Bry, H x & Br Br 4. Draw the aldol product and the aldol condensation product of the following molecule: aldol aldol condensation H 5. What single molecule will make the first molecule? What single...
Section 4. Total points 26 1. Give one example of each of the following name reactions. For each reaction, you MUST INCLUDE: i) IUPAC Name of the reactant ii) IUPAC Name of the product iii) Reagents and reaction conditions (4points X 4 = 16 points) a. H.V.Z reaction b. Crossed aldol reaction between an aldehyde and a ketone 2-Propanone Benzaldehple c. Michael reaction between an a.ß unsaturated aldehyde and a B-diketone. d. Dieckman Condensation to have a cyclic product with...
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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