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4. (2 pts) Consider the enolate forming reaction below. Provide the structure of the enolate anion...
Claisen Condensations Claisen condensations involve the enolate anion of an ester which acts as a nucleophile...
Claisen Condensations Claisen condensations involve the enolate anion of an ester which acts as a nucleophile attacking another molecule of ester. The resulting product of this reaction is a Beta-ketoester. Draw the enolate anion which serves as the nucleophile in the reaction above. Draw the resonance structure of this enolate. Look at the mechanism of this reaction in your textbook (7^th edition), pages 773-774. What type of reaction does this resemble, S_N1,S_N2, E1, or E2? Ethanol is one of the...
6. (4 pts.) Draw the two resonance structures of the enolate formed from the following reaction: 7. (4 pts) Draw th...
6. (4 pts.) Draw the two resonance structures of the enolate formed from the following reaction: 7. (4 pts) Draw the structure of an alkyl bromide (R-Br) and an alkoxide (R-O) that would provide the most efficient synthesis of the following ether by the Williamson ether synthesis. Target ether 8. (5 pts.) Draw a mechanism for the following E2 reaction. Draw the major product. Be sure to include any necessary H's in your structure as you draw the mechanism. OH...
2) Draw the structure of the enolate formed in the first reaction and then the mechanism of the Aldol reaction in the s...
2) Draw the structure of the enolate formed in the first reaction and then the mechanism of the Aldol reaction in the second reaction. There is an acid work up step at the very end to neutralize charges only. (10 pts) LDA No mechanism Mechanism starts here in this step
Problem 3. (up to 10 pts) Consider the following reaction. Provide the structure of the compound...
Problem 3. (up to 10 pts) Consider the following reaction. Provide the structure of the compound formed in the transformation. Explain the formation of the single product. Your explanation must include the drawings of two chair conformations. CH3ON CH3OH (solv.)
1. Provide a multiple step synthesis for the transformation shown below. 2. Identify the carboxylic acid...
1. Provide a multiple step synthesis for the transformation
shown below.
2. Identify the carboxylic acid and alcohol needed to make the
ester shown below.
3. Propose a mechanism for the reaction shown below.
4. Show all the important resonance structures for the anion
shown below. Include arrows that show how to reach each form.
Indicate which resonance structure makes the greatest
contribution to the resonance hybrid and which resonance structure
makes the least contribution to the resonance
hybrid.
1....
provide the molecular formula of skeletal structure Question 4 2 pts Which of the following molecules...
provide the molecular formula of skeletal structure
Question 4 2 pts Which of the following molecules is the strongest acid? O lactic acid (pKa 3.9) O acetic acid (pKa 4.8) O ethanol (pKa 15.9) O ammonia (pKa 37)
Consider the reaction of 2-methyl-1,3-cyclohexadiene with HCI. Assuming that the reaction takes place at a very...
Consider the reaction of 2-methyl-1,3-cyclohexadiene with HCI. Assuming that the reaction takes place at a very low temperature: (a) draw the intermediate and product structures, indluding any formnal charges. more stable resonance formless stable resonance form HCI CI CI Scroll down for parts (b) and (c) (b) What is the major product of the reaction at very low temperatures? O Both products are formed in equal amounts. O The 1,2-addition product O The 1,4-addition product. (c) Is the reaction under...
Consider the reaction of 2-methyl-1,3-cyclohexadiene with HCl. Assuming that the reaction takes place at a very...
Consider the reaction of 2-methyl-1,3-cyclohexadiene with HCl. Assuming that the reaction takes place at a very low temperature: (a) draw the intemediate and product structures, including any formal charges. more stable resonance form less stable resonance form НC cr сг Cl Scroll down for parts (b) and (c). Cl Exit Next Try Again Give Up & View Solution Previqus (b) What is the major product of the reaction at very low temperatures? Both products are formed in equal amounts. O...
11) (5 pts) Provide the major organic product(s) of the reaction below. 1. CH3CH2MgBr (2 eq)...
11) (5 pts) Provide the major organic product(s) of the reaction below. 1. CH3CH2MgBr (2 eq) Нас 3 Cl 2. H', H20
Consider the reaction below. Understanding what you know about resonance stabilities provides the 2 possible carbocations...
Consider the reaction below. Understanding what you know about resonance stabilities provides the 2 possible carbocations and the resonance structures of H+ addition to the reactant. Circle the carbocation that is the major product due to resonance stabilities. Provide the 1, 2 and 1, 4 products of that carbocation: Why did you pick that carbocation? Provide the 2 unlikely products of 1, 2 and 1, 4 additions from the other carbocation intermediate not chosen above. Hopefully you noted that the...
Claisen Condensations Claisen condensations involve the enolate anion of an ester which acts as a nucleophile attacking another molecule of ester. The resulting product of this reaction is a Beta-ketoester. Draw the enolate anion which serves as the nucleophile in the reaction above. Draw the resonance structure of this enolate. Look at the mechanism of this reaction in your textbook (7^th edition), pages 773-774. What type of reaction does this resemble, S_N1,S_N2, E1, or E2? Ethanol is one of the...
6. (4 pts.) Draw the two resonance structures of the enolate formed from the following reaction: 7. (4 pts) Draw the structure of an alkyl bromide (R-Br) and an alkoxide (R-O) that would provide the most efficient synthesis of the following ether by the Williamson ether synthesis. Target ether 8. (5 pts.) Draw a mechanism for the following E2 reaction. Draw the major product. Be sure to include any necessary H's in your structure as you draw the mechanism. OH...
2) Draw the structure of the enolate formed in the first reaction and then the mechanism of the Aldol reaction in the second reaction. There is an acid work up step at the very end to neutralize charges only. (10 pts) LDA No mechanism Mechanism starts here in this step
Problem 3. (up to 10 pts) Consider the following reaction. Provide the structure of the compound formed in the transformation. Explain the formation of the single product. Your explanation must include the drawings of two chair conformations. CH3ON CH3OH (solv.)
1. Provide a multiple step synthesis for the transformation
shown below.
2. Identify the carboxylic acid and alcohol needed to make the
ester shown below.
3. Propose a mechanism for the reaction shown below.
4. Show all the important resonance structures for the anion
shown below. Include arrows that show how to reach each form.
Indicate which resonance structure makes the greatest
contribution to the resonance hybrid and which resonance structure
makes the least contribution to the resonance
hybrid.
1....
provide the molecular formula of skeletal structure
Question 4 2 pts Which of the following molecules is the strongest acid? O lactic acid (pKa 3.9) O acetic acid (pKa 4.8) O ethanol (pKa 15.9) O ammonia (pKa 37)
Consider the reaction of 2-methyl-1,3-cyclohexadiene with HCI. Assuming that the reaction takes place at a very low temperature: (a) draw the intermediate and product structures, indluding any formnal charges. more stable resonance formless stable resonance form HCI CI CI Scroll down for parts (b) and (c) (b) What is the major product of the reaction at very low temperatures? O Both products are formed in equal amounts. O The 1,2-addition product O The 1,4-addition product. (c) Is the reaction under...
Consider the reaction of 2-methyl-1,3-cyclohexadiene with HCl. Assuming that the reaction takes place at a very low temperature: (a) draw the intemediate and product structures, including any formal charges. more stable resonance form less stable resonance form НC cr сг Cl Scroll down for parts (b) and (c). Cl Exit Next Try Again Give Up & View Solution Previqus (b) What is the major product of the reaction at very low temperatures? Both products are formed in equal amounts. O...
11) (5 pts) Provide the major organic product(s) of the reaction below. 1. CH3CH2MgBr (2 eq) Нас 3 Cl 2. H', H20
Consider the reaction below. Understanding what you know about resonance stabilities provides the 2 possible carbocations and the resonance structures of H+ addition to the reactant. Circle the carbocation that is the major product due to resonance stabilities. Provide the 1, 2 and 1, 4 products of that carbocation: Why did you pick that carbocation? Provide the 2 unlikely products of 1, 2 and 1, 4 additions from the other carbocation intermediate not chosen above. Hopefully you noted that the...
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