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Arrange the nucleophiles from best to worst. Assume the reaction is occurring with CH_3 Br in...
Ans: D Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 50) Consider an Sy2 reaction...
Ans: D Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 50) Consider an Sy2 reaction of NaSH in a polar aprotic solvent with (CH),CHCH CH2X. What would be the relative order of reactivity for the following X substituents? LX-1 L. XBr III. X CI IV X = F a)I> II>III> IV b) II>1> IV> IIl c) IV > III> II>I d) III>1> II> IV e) None of these choices Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 51)...
Q1:Rank the following leaving groups from best (top) to worst (bottom) in nucleophilic substitution reaction: Br,...
Q1:Rank the following leaving groups from best (top) to worst
(bottom) in nucleophilic substitution reaction: Br, I, F, Cl.
Q2:
The silica gel TLC below shows analysis of fractions collected
after column chromatography of the crude reaction mixture obtained
in Williamson Ether Synthesis lab ("mixture" is the spot of the
reaction mixture before column). Which fractions (1-6) should be
collected to obtain pure product? Enter the corresponding fraction
numbers separated by comma (i.e., 1,2,etc.)
Word Answer:
Consider the SN2 reaction of butyl bromide with hydroxide ion , Assuming no other changes, what...
Consider the SN2 reaction of butyl bromide with hydroxide ion , Assuming no other changes, what effect on the reaction rate would result from simultaneously doubling the concentrations of both butyl bromide and hydroxyl ion No effect (B)It would double the rate (C)it would increase the rate six times (D) It would increase the rate four times. 2. Which alky halide would you expect to undergo SN1 hydrolysis most rapidly? (A) (CH3)3C-I (B) (CH3)3C-Br (C) (CH3)3C-Cl (D) (CH3)3C-F 3....
QUESTION 36 Which would be the best substrate for a reaction that involves heterolysis? bromobenzene bromobutane...
QUESTION 36 Which would be the best substrate for a reaction that involves heterolysis? bromobenzene bromobutane 2-bromopropene benzyl bromide QUESTION 37 Which nitrile would form fastest in a substitution reaction of an alkyl tosylate with cyanide in a polar aprotic solvent 2-methylpentanenitrile 2.2-dimethylpentanenitrile pentanenitrile 3-methylpentanenitrile QUESTION 38 QUESTION 38 Which compound would have an odd molecular ion peak in the mass spectrum? O trichloromethane 1.1.2-trifluoroethanol ethylene oxide butan-2-amine QUESTION 39 How many products would result from the benzyne reaction (Na/NH3)...
17. Which of the following statements is true? A. An Sw1 reaction always proceeds faster than...
17. Which of the following statements is true? A. An Sw1 reaction always proceeds faster than an S2 reaction. B. An Sw2 reaction is not stereospecific C. Good alkyl halide substrates for an E1 reaction are also good for an E2 reaction. D. Increasing the alkyl halide concentration enhances the reaction rate of an Sw1 reaction but not that of an E2 reaction. 18. For the following reaction, what happens to the reaction rate if the concentration of NaN, is...
A. What is the best procedure to prepare isopropyl methyl ether (CH)CHOCH? a. isopropyl iodide and...
A. What is the best procedure to prepare isopropyl methyl ether (CH)CHOCH? a. isopropyl iodide and NaOCH, b. isopropyl iodide and methanol c. methyl iodide and KOCH(CH) d. methyl iodide and (CH).CHOH B. Which alkyl halide would be most reactive in an S2 reaction? сн, a. (CHC-CHCI b d. B. What is the order of increasing reactivity for the following nucleophiles (least first)? Cно Н.О CH CO CHS Which is not a polar aprotic solvent? C. ь. снCN с. снон...
please give correct answer to these 5 questions with explanations, thankyou Alkenes are nucleophiles that can...
please give correct answer to these 5 questions with
explanations, thankyou
Alkenes are nucleophiles that can undergo electrophilic addition. Which of the following best describes the nucleophilic nature of alkenes? Select one a. The TT bond is localised above and below the C-C o bond, and the TT electrons are relatively far away from the nuclei and are loosely bound b. The bond is localised above and below the C-CT bond, and the electrons are relatively far away from the...
1. Which of the following takes place faster by an S2 reaction! 2. Rank from strongest...
1. Which of the following takes place faster by an S2 reaction! 2. Rank from strongest nucleophile to weakest nucleophile. A HO B. HO C. HN D. H 3. Which of the following SN2 reactions is fastest? , (o) (a) H3C-CECH Na NaH CHBr (SN2) сH,Br (b) Naci (S2) 4. Which of the following takes place faster by an E2 mechanism? ONa 5. Which is the best leaving group? A. F" B. CI C. HO D. Br E. H
What is the major Organic product from the following sequence of reactions? 1) NaNH2 2) Br...
What is the major Organic product from the following sequence of reactions? 1) NaNH2 2) Br W u on ou oh oh oh NH (a) (d) (e ) a. a b.b d. d e. e f. f Arrange the following species in order of increasing nucleophile strength in an SN 2 reaction. h:1-, CH3NH2, CH301- O a. (Weakest nucleophile) CH3NH2 < CH301- <H:1- (Strongest Nucleophile) O b. (Weakest nucleophile) CH3NH2 <H:1- < CH301- (Strongest Nucleophile) OC (Weakest nucleophile) CH301- <h:1-...
13. Give the curved arrow mechanism for each alkylation reaction. a. LiNiPr, (LDA) a. b. CH,Br CH, a. LiNiPr, (LDA)...
13. Give the curved arrow mechanism for each alkylation reaction. a. LiNiPr, (LDA) a. b. CH,Br CH, a. LiNiPr, (LDA) b. CHy-CHCH, b. 14. Explain why reaction G gives good yields of the product shown, while the yields are not as good with reaction H. о a. LDA G: b. CH,I CH a. LDA H: b. CH,I CHy 15. Give the major organic product of each reaction. Cl2 a. LDA CH,CO,H b. PЬСH, a. LDA Br2 b. f. b. CH,CH,CI...
Ans: D Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 50) Consider an Sy2 reaction of NaSH in a polar aprotic solvent with (CH),CHCH CH2X. What would be the relative order of reactivity for the following X substituents? LX-1 L. XBr III. X CI IV X = F a)I> II>III> IV b) II>1> IV> IIl c) IV > III> II>I d) III>1> II> IV e) None of these choices Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 51)...
Q1:Rank the following leaving groups from best (top) to worst
(bottom) in nucleophilic substitution reaction: Br, I, F, Cl.
Q2:
The silica gel TLC below shows analysis of fractions collected
after column chromatography of the crude reaction mixture obtained
in Williamson Ether Synthesis lab ("mixture" is the spot of the
reaction mixture before column). Which fractions (1-6) should be
collected to obtain pure product? Enter the corresponding fraction
numbers separated by comma (i.e., 1,2,etc.)
Word Answer:
QUESTION 36 Which would be the best substrate for a reaction that involves heterolysis? bromobenzene bromobutane 2-bromopropene benzyl bromide QUESTION 37 Which nitrile would form fastest in a substitution reaction of an alkyl tosylate with cyanide in a polar aprotic solvent 2-methylpentanenitrile 2.2-dimethylpentanenitrile pentanenitrile 3-methylpentanenitrile QUESTION 38 QUESTION 38 Which compound would have an odd molecular ion peak in the mass spectrum? O trichloromethane 1.1.2-trifluoroethanol ethylene oxide butan-2-amine QUESTION 39 How many products would result from the benzyne reaction (Na/NH3)...
17. Which of the following statements is true? A. An Sw1 reaction always proceeds faster than an S2 reaction. B. An Sw2 reaction is not stereospecific C. Good alkyl halide substrates for an E1 reaction are also good for an E2 reaction. D. Increasing the alkyl halide concentration enhances the reaction rate of an Sw1 reaction but not that of an E2 reaction. 18. For the following reaction, what happens to the reaction rate if the concentration of NaN, is...
A. What is the best procedure to prepare isopropyl methyl ether (CH)CHOCH? a. isopropyl iodide and NaOCH, b. isopropyl iodide and methanol c. methyl iodide and KOCH(CH) d. methyl iodide and (CH).CHOH B. Which alkyl halide would be most reactive in an S2 reaction? сн, a. (CHC-CHCI b d. B. What is the order of increasing reactivity for the following nucleophiles (least first)? Cно Н.О CH CO CHS Which is not a polar aprotic solvent? C. ь. снCN с. снон...
please give correct answer to these 5 questions with
explanations, thankyou
Alkenes are nucleophiles that can undergo electrophilic addition. Which of the following best describes the nucleophilic nature of alkenes? Select one a. The TT bond is localised above and below the C-C o bond, and the TT electrons are relatively far away from the nuclei and are loosely bound b. The bond is localised above and below the C-CT bond, and the electrons are relatively far away from the...
1. Which of the following takes place faster by an S2 reaction! 2. Rank from strongest nucleophile to weakest nucleophile. A HO B. HO C. HN D. H 3. Which of the following SN2 reactions is fastest? , (o) (a) H3C-CECH Na NaH CHBr (SN2) сH,Br (b) Naci (S2) 4. Which of the following takes place faster by an E2 mechanism? ONa 5. Which is the best leaving group? A. F" B. CI C. HO D. Br E. H
What is the major Organic product from the following sequence of reactions? 1) NaNH2 2) Br W u on ou oh oh oh NH (a) (d) (e ) a. a b.b d. d e. e f. f Arrange the following species in order of increasing nucleophile strength in an SN 2 reaction. h:1-, CH3NH2, CH301- O a. (Weakest nucleophile) CH3NH2 < CH301- <H:1- (Strongest Nucleophile) O b. (Weakest nucleophile) CH3NH2 <H:1- < CH301- (Strongest Nucleophile) OC (Weakest nucleophile) CH301- <h:1-...
13. Give the curved arrow mechanism for each alkylation reaction. a. LiNiPr, (LDA) a. b. CH,Br CH, a. LiNiPr, (LDA) b. CHy-CHCH, b. 14. Explain why reaction G gives good yields of the product shown, while the yields are not as good with reaction H. о a. LDA G: b. CH,I CH a. LDA H: b. CH,I CHy 15. Give the major organic product of each reaction. Cl2 a. LDA CH,CO,H b. PЬСH, a. LDA Br2 b. f. b. CH,CH,CI...
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