Homework Answers
6. Ans is B. The corbony compounds A, C, D and E not having any resonance structure accept B corbonyl compound. Only B corbonyl compound having resonance structure which can make keto-enol equilibrium establishatio.
7. Ans is 3. H2SO4 is Lewis acid and this H+ will take electron from corbony compound group, the corbony group become electrophile which is needs electron from nucleophile. Then the OH group will act as a nucleophile, it will attack on electrophile corbony compound and it forms cyclized product, which is shown in the question number 7, answers number 3.
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6. Which one of the following carbonyl compounds has the highest percentage of enol when keto-enol...
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound...
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound of those shown below will exist with the highest percent in the enol form?: 8 8 d 8 A. 7. Select the product for the reaction indicated: 0 Br Bry AcOH Br Br Br A. B D
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound...
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound of those shown below will exist with the highest percent in the enol form?: OH D. B. 7. Select the product for the reaction indicated: Br Br Bra ACOH Br Br Br Å A B
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound...
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound of those shown below will exist with the highest percent in the enol form?: 0 8 OH B. C. D. 7. Select the product for the reaction indicated: Br Br Bra AcОН Br Br , Br & B.
Question 3 Which of the following is a keto-enol tautomeric pair? OH OH OH and and...
Question 3 Which of the following is a keto-enol tautomeric pair? OH OH OH and and o and COM OH I II III он OH a and a and IV CA. 1 B. V C.II D. IV E. III Question 4 What would be the major product of the following reaction sequence? он PCC 1. LDA(-78C) 2. CHCHOI ? CH C1 HO వరలో I II MI o IV A. II B. I C. V D. III E. IV
(e) (15 pts) When compound I undergoes the chemical transformations seen below, two new carbonyl compounds...
(e) (15 pts) When compound I undergoes the chemical transformations seen below, two new carbonyl compounds are formed (III and IV). 1 equivalent of MgBr I DIBAL-H III (major organic product) IV (major organic product) 1) (6 pts) Provide the structures for compounds III and IV. (11) (9 pts) Which of the two carbonyl compounds is more susceptible to nucleophilic addition: III or IV ? Provide two reasons for your choice. (1) pts) Rank the following compounds in the order...
CONCEPT QUESTION: PREDICT THE PRODUCT Provide the stable organic product(s) that would result for each reaction...
CONCEPT QUESTION: PREDICT THE PRODUCT Provide the stable organic product(s) that would result for each reaction below. Label the product formed in highest yield as "major" OH OH K2Cr207 H2SO4 acetone 0 OH NaNO3 (2 eq.) AcOH reflux HO 0 PCC (3 eq.) H20 он HO PCC (3 eq.) DCM но K2Cr207 H2SO4 H20 он
11) (50 pts total) Consider the following 2 compounds: Yor You I II (a) (6 pts)...
11) (50 pts total) Consider the following 2 compounds: Yor You I II (a) (6 pts) Provide the IUPAC names for compounds I and II. Compound I: Compound II: (b) (10 pts) Draw the resonance contributors of compounds I and II. Which compound is more stable? Explain in 20 words or less. (c) (6 pts) Which C-N bond below is shorter, A or B ? Explain in 20 words or less. (d) (6 pts) Draw the products obtained when compound...
HW 22: Enolates 1. Provide a detailed, stepwise mechanism for the base-catalyzed enolization (keto enol tautomerism) of acetaldehyde. 2. Provide the major organic product of the folowing reactio...
HW 22: Enolates 1. Provide a detailed, stepwise mechanism for the base-catalyzed enolization (keto enol tautomerism) of acetaldehyde. 2. Provide the major organic product of the folowing reaction. 3. Provide the major organic product of the following reaction LDA 4. Which of the following ketones will give a positive iodoform test? A) 4-heptanone D) cyclohexanone B) 3-hexanone C)2-hexanone 5. Provide the major organic product of the following reaction. 6. Provide the structure of the major organic product which results when...
Question Completion Status Which of has the the most following carbonyl compounds acidic hydrogen? (B u...
Question Completion Status Which of has the the most following carbonyl compounds acidic hydrogen? (B u o Type here to search e a Question Completion Status product obtained What from the is the major organic following reaction ? Tom Hit (A) na formed What is from the the major organic product following reaction sequence CCM), cox CH,CQ, H, HoO of the following What is the product reaction sequence > RCOGH, (CH), Cubi H,
Which of the following reactions (A-D) will not work as drawn: [1 pt] reaction A MeΝΗ,...
Which of the following reactions (A-D) will not work as drawn: [1 pt] reaction A MeΝΗ, reactionc HO INAMO MeNH H2SO4 reaction B HO H2SO4 reaction D 5: Which compound below (A-E) is the product of the reaction in the box: [1 pt] product 1) propionyl chloride, AICI, 2) NaCN, HCI 3) LAH 4)H20 OH of more on one B: Which compound below will have the highest percentage of enol form in solution: [1 pt) & fu & l 7:...
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound of those shown below will exist with the highest percent in the enol form?: 8 8 d 8 A. 7. Select the product for the reaction indicated: 0 Br Bry AcOH Br Br Br A. B D
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound of those shown below will exist with the highest percent in the enol form?: OH D. B. 7. Select the product for the reaction indicated: Br Br Bra ACOH Br Br Br Å A B
6. Some compounds can exist as the enol form at equilibrium in high percentage. Which compound of those shown below will exist with the highest percent in the enol form?: 0 8 OH B. C. D. 7. Select the product for the reaction indicated: Br Br Bra AcОН Br Br , Br & B.
Question 3 Which of the following is a keto-enol tautomeric pair? OH OH OH and and o and COM OH I II III он OH a and a and IV CA. 1 B. V C.II D. IV E. III Question 4 What would be the major product of the following reaction sequence? он PCC 1. LDA(-78C) 2. CHCHOI ? CH C1 HO వరలో I II MI o IV A. II B. I C. V D. III E. IV
(e) (15 pts) When compound I undergoes the chemical transformations seen below, two new carbonyl compounds are formed (III and IV). 1 equivalent of MgBr I DIBAL-H III (major organic product) IV (major organic product) 1) (6 pts) Provide the structures for compounds III and IV. (11) (9 pts) Which of the two carbonyl compounds is more susceptible to nucleophilic addition: III or IV ? Provide two reasons for your choice. (1) pts) Rank the following compounds in the order...
CONCEPT QUESTION: PREDICT THE PRODUCT Provide the stable organic product(s) that would result for each reaction below. Label the product formed in highest yield as "major" OH OH K2Cr207 H2SO4 acetone 0 OH NaNO3 (2 eq.) AcOH reflux HO 0 PCC (3 eq.) H20 он HO PCC (3 eq.) DCM но K2Cr207 H2SO4 H20 он
11) (50 pts total) Consider the following 2 compounds: Yor You I II (a) (6 pts) Provide the IUPAC names for compounds I and II. Compound I: Compound II: (b) (10 pts) Draw the resonance contributors of compounds I and II. Which compound is more stable? Explain in 20 words or less. (c) (6 pts) Which C-N bond below is shorter, A or B ? Explain in 20 words or less. (d) (6 pts) Draw the products obtained when compound...
HW 22: Enolates 1. Provide a detailed, stepwise mechanism for the base-catalyzed enolization (keto enol tautomerism) of acetaldehyde. 2. Provide the major organic product of the folowing reaction. 3. Provide the major organic product of the following reaction LDA 4. Which of the following ketones will give a positive iodoform test? A) 4-heptanone D) cyclohexanone B) 3-hexanone C)2-hexanone 5. Provide the major organic product of the following reaction. 6. Provide the structure of the major organic product which results when...
Question Completion Status Which of has the the most following carbonyl compounds acidic hydrogen? (B u o Type here to search e a Question Completion Status product obtained What from the is the major organic following reaction ? Tom Hit (A) na formed What is from the the major organic product following reaction sequence CCM), cox CH,CQ, H, HoO of the following What is the product reaction sequence > RCOGH, (CH), Cubi H,
Which of the following reactions (A-D) will not work as drawn: [1 pt] reaction A MeΝΗ, reactionc HO INAMO MeNH H2SO4 reaction B HO H2SO4 reaction D 5: Which compound below (A-E) is the product of the reaction in the box: [1 pt] product 1) propionyl chloride, AICI, 2) NaCN, HCI 3) LAH 4)H20 OH of more on one B: Which compound below will have the highest percentage of enol form in solution: [1 pt) & fu & l 7:...
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