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Choose the correct answer. Which of the following statements is consistent with the mechanism for the...
Choose the correct answer. Which of the following statements is consistent with the mechanism for the...
Choose the correct answer. Which of the following statements is consistent with the mechanism for the nucleophilic addition of aldehydes/ketones under acidic conditions? a proton transfer followed by a nucleophilic attack nucleophilic attack is the only step a nucleophilic attack followed by a proton transfer none of the above proton transfer is not required
Question 1 1 pt Which of the following is/are accurate statements concerning the mechanism shown ...
Question 1 1 pt Which of the following is/are accurate statements concerning the mechanism shown below? Assume that liquid ammonia and enough HCI to make sufficient NH4 ion are present in the reaction mixture. Select all that apply. n The collapse of the tetrahedral intermediate represented by step 3 is incorrect because under the acid-catalyzed conditions, hydroxide ion will not be a viable leaving group. Leaving aside the issue of whether hydroxide ion would be present or not, the electron...
Classify the circled atom as nucleophilic, electrophilic, or neither. Select one: O a. Nucleophilic O b....
Classify the circled atom as nucleophilic, electrophilic, or neither. Select one: O a. Nucleophilic O b. Electrophilic c. Neither Draw the mechanism for the following SN1 reaction. Indicate which of the following statements is true. Select all correct answers to receive full credit. Cl +NaF Select one or more: a. The mechanism involves only a loss of leaving group and a nucleophilic attack and no other steps. b. A carbocation rearrangement occurs. c. The first step is a proton transfer....
please give correct answers to these 5 questions with explanations, thankyou Which solvent(s) is required for...
please give correct answers to these 5 questions with
explanations, thankyou
Which solvent(s) is required for a nucleophilic addition reaction involving a Grignard reagent and a carbonyl compound? What is the primary organic product of the following reaction? н* Select one: +H2N. All reactions must be carried out in water All reactions must be carried out in dry solvents (free of water, for example diethyl ether). Select one There will be no reaction An initial reaction must be carried in...
CH3 CH2 Secondary amines add to aldehydes and ketones to give enamines. Enamines are formed in...
CH3 CH2 Secondary amines add to aldehydes and ketones to give enamines. Enamines are formed in a reversible, acid-catalyzed proces nucleophilic addition of the secondary amine to the carbonyl group, followed by transfer of the proton to yield a neutral carbinolanine Prosonation of the hydroxyl group converts it into a good leaving group, is no Instead, a proton is lost from the neighboring carbon to form an enamine. p, however there is no hydrogen left on the nitrogen to be...
oleh Secondary amines add to aldehydes and ketones to give enamines. Enamines are formed in a...
oleh Secondary amines add to aldehydes and ketones to give enamines. Enamines are formed in a reversible, acid-catalyzed process that begins with nucleophilic addition of the secondary amine to the carbonyl group, followed by transfer of the proton to yield a neutral carbinolamine. Protonation of the hydroxyl group converts it into a good leaving group, however there is no hydrogen left on the nitrogen to be lost to form a neutral imine product. Instead, a proton is lost from the...
Which one of the following statements about Reaction #1 is correct? Reaction #1 HITI 1. KN3...
Which one of the following statements about Reaction #1 is correct? Reaction #1 HITI 1. KN3 2. H30+ The major organic product(s) arise from nucleophilic attack at carbon A The major organic product(s) arise from nucleophilic attack at carbon B None of the above
Which of the following statements about Reaction 3 and 4 is correct? Reaction 3 1. CH...
Which of the following statements about Reaction 3 and 4 is
correct?
Reaction 3 1. CH CH2MgBr, dry THF 2. H30. The major organic product(s) arise from nucleophilic attack at carbon A a The major organic product(s) arise from nucleophilic attack at carbon B O None of the above
1. Diagram the mechanism for this reaction and label the arrows. First is a proton transfer...
1. Diagram the mechanism for this reaction and label the arrows. First is a proton transfer to the DCC, then nucleophilic attack at the carbon of DCC and the result is a good LG. Next is the acyl substitution by addition step with the amine followed by two proton transfers next is the elimination of the LG (dicyclohexylurea) to produce the amide. Hint: follow the colored atom in the starting materials and products. (12pts.) Extra credit (3pts.) Use IUPAC nomenclature...
Question 4 [1.5 pts] Which one of the following statements about Reaction #3 is correct? Reaction...
Question 4 [1.5 pts] Which one of the following statements about Reaction #3 is correct? Reaction #3 1. KBr 2. H30* O O O The organic product(s) arise solely from nucleophilic attack at carbon B The organic product(s) arise solely from nucleophilic attack at carbon C None of the above
Choose the correct answer. Which of the following statements is consistent with the mechanism for the nucleophilic addition of aldehydes/ketones under acidic conditions? a proton transfer followed by a nucleophilic attack nucleophilic attack is the only step a nucleophilic attack followed by a proton transfer none of the above proton transfer is not required
Question 1 1 pt Which of the following is/are accurate statements concerning the mechanism shown below? Assume that liquid ammonia and enough HCI to make sufficient NH4 ion are present in the reaction mixture. Select all that apply. n The collapse of the tetrahedral intermediate represented by step 3 is incorrect because under the acid-catalyzed conditions, hydroxide ion will not be a viable leaving group. Leaving aside the issue of whether hydroxide ion would be present or not, the electron...
Classify the circled atom as nucleophilic, electrophilic, or neither. Select one: O a. Nucleophilic O b. Electrophilic c. Neither Draw the mechanism for the following SN1 reaction. Indicate which of the following statements is true. Select all correct answers to receive full credit. Cl +NaF Select one or more: a. The mechanism involves only a loss of leaving group and a nucleophilic attack and no other steps. b. A carbocation rearrangement occurs. c. The first step is a proton transfer....
please give correct answers to these 5 questions with
explanations, thankyou
Which solvent(s) is required for a nucleophilic addition reaction involving a Grignard reagent and a carbonyl compound? What is the primary organic product of the following reaction? н* Select one: +H2N. All reactions must be carried out in water All reactions must be carried out in dry solvents (free of water, for example diethyl ether). Select one There will be no reaction An initial reaction must be carried in...
CH3 CH2 Secondary amines add to aldehydes and ketones to give enamines. Enamines are formed in a reversible, acid-catalyzed proces nucleophilic addition of the secondary amine to the carbonyl group, followed by transfer of the proton to yield a neutral carbinolanine Prosonation of the hydroxyl group converts it into a good leaving group, is no Instead, a proton is lost from the neighboring carbon to form an enamine. p, however there is no hydrogen left on the nitrogen to be...
oleh Secondary amines add to aldehydes and ketones to give enamines. Enamines are formed in a reversible, acid-catalyzed process that begins with nucleophilic addition of the secondary amine to the carbonyl group, followed by transfer of the proton to yield a neutral carbinolamine. Protonation of the hydroxyl group converts it into a good leaving group, however there is no hydrogen left on the nitrogen to be lost to form a neutral imine product. Instead, a proton is lost from the...
Which one of the following statements about Reaction #1 is correct? Reaction #1 HITI 1. KN3 2. H30+ The major organic product(s) arise from nucleophilic attack at carbon A The major organic product(s) arise from nucleophilic attack at carbon B None of the above
Which of the following statements about Reaction 3 and 4 is
correct?
Reaction 3 1. CH CH2MgBr, dry THF 2. H30. The major organic product(s) arise from nucleophilic attack at carbon A a The major organic product(s) arise from nucleophilic attack at carbon B O None of the above
1. Diagram the mechanism for this reaction and label the arrows. First is a proton transfer to the DCC, then nucleophilic attack at the carbon of DCC and the result is a good LG. Next is the acyl substitution by addition step with the amine followed by two proton transfers next is the elimination of the LG (dicyclohexylurea) to produce the amide. Hint: follow the colored atom in the starting materials and products. (12pts.) Extra credit (3pts.) Use IUPAC nomenclature...
Question 4 [1.5 pts] Which one of the following statements about Reaction #3 is correct? Reaction #3 1. KBr 2. H30* O O O The organic product(s) arise solely from nucleophilic attack at carbon B The organic product(s) arise solely from nucleophilic attack at carbon C None of the above
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