Homework Answers
8)Solution-
Ans 8: c) The fastest reaction is B.
Free radicals are formed in the reaction.
The formation of secondary radical is more favorable than the
primary radical.
Now here Br atom is larger than Cl atom
Therefore the formation of HBr is more favored than the formation
of HCl.
Hence the reaction B is the fastest reaction and it has the lowest activation energy.
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Which of the following is true for reactions A, B, and C? 8. CH3CH2CH,+ Br CH,CH2CH2...
Which statement below is true regarding substitution mechanisms at a chiral center? a. Si reactions lead...
Which statement below is true regarding substitution mechanisms at a chiral center? a. Si reactions lead to inversion of configuration at the chiral carbon and Sy2 lead to a racemic mixture. b. Both Sy2 and Syl lead to retention of configuration. c. Both Sp2 and Syl lead to inversion of configuration. d. Sn2 reactions lead to inversion of configuration at the chiral carbon and Sy1 reactions lead to retention of configuration at the chiral carbon, e. Syl reactions lead to...
1.(1 pt. each) Consider the following statements regarding Syl, SN2, E1 and E2 reactions. To which...
1.(1 pt. each) Consider the following statements regarding Syl, SN2, E1 and E2 reactions. To which mechansims, if any, does each statement apply? If the statement can be applied to more than one mechanism, indicate each mechanism. SNI a) Involves a carbocation intermediate SNIEL b) Substitution at a stereocenter give predominantly a racemic product c) Rearrangements of the carbon skeleton are possible. EL SM d) Is greatly accelerated in protic solvents of increasing polarity SN e) Is first order in...
please answer questions 9-12 Question 9 1 pts Which of the following statements describes the reactivity...
please answer questions 9-12
Question 9 1 pts Which of the following statements describes the reactivity of alkynes? An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. When a symmetrical internal alkyne reacts with HBr, two products are formed. Unlike alkenes, alkynes fail to undergo electrophilic addition reactions The o bonds of alkynes are greater in energy than the rt bonds and, therefore, are more reactive Alkynes react as electrophiles, whereas alkenes react as nucleophiles What is...
please help Which of the following reactions is not correct as written? Br 1) NaOCH, major product сH, он Br 2) CH...
please help
Which of the following reactions is not correct as written? Br 1) NaOCH, major product сH, он Br 2) CH,CO Na major product сH,Cо Н Br 3) CH,CH,SNa major product DMF A 1) and 2) are incorrect 2) and 3) are incorrect C 3) is incorrect D 2) is incorrect E All are correct
Which of the following reactions is not correct as written? Br 1) NaOCH, major product сH, он Br 2) CH,CO Na major product сH,Cо...
please help in answering all of the questions 15. Which is a propagation step in the...
please help in answering all of the questions
15. Which is a propagation step in the peride-initiated hydrobromination of 1 butene? (A) CH,CH:CH-CH, HBr -- CH,CH.CH,CH,Br (B) CH.CH.CH-CH,+Br - CH CH.CHCH,Br (C) CH.CH,CH,CH*+ Br-CH,CH,CH.CH, Br (D) ROOR + CH,CH,CH=CH, - RO + KOH + CHỊCH,CH,CH, 35. Indicate which C-H bond has the lowest bond dissociation enthalpy (energy)? (A) H-CH(CH), (B) H-CH (C) H-C(CH,), (D) H-CH,CH, 37 d. Predict the major product for this reaction (A) (B) BE BE (C) Br...
For the following substitution reactions, choose whether reaction A or B will proceed more quickly. If...
For the following substitution reactions, choose whether reaction A or B will proceed more quickly. If they will proceed at the same rate, put an equal sign,"=", in the box. Reaction Pair Faster? SN1 or SN2? A: CH3Br + CH30-→ CH3OCH3 + Br- B: CH3Br + CH3OH → CH3OCH3 + Br- + H+ Cl + NH3 NH + Cl + H+ B: Ya + Ho — you +C+++11+ OH + Cl + H+ I + NH3 NH2 +I+H+ SN2 ci...
1. Which of the following compounds gives the fastest Syl reaction? Br 1 Br a. 1 d. 4 c. 3 b.2 2. What is the produ...
1. Which of the following compounds gives the fastest Syl reaction? Br 1 Br a. 1 d. 4 c. 3 b.2 2. What is the product of the following reaction? HBr Br Br Br OH d. 4 a. 1 3. Which compound would be the major elimination product of the following reaction? NaOCH.CH ethanol a. 1 b. 2 c. 3 d. 4 4. Which of the following would you expect to have the lowest boiling point? HO -OH 3 4...
Which compound can undergo both Syl and Sy2 56. reactions? (A) H3C Br (B) H3C Br...
Which compound can undergo both Syl and Sy2 56. reactions? (A) H3C Br (B) H3C Br H3C "CHнз (C) (D) Br When HCI reacts with the following alkene, what major product is formed? 57. CHз HCI H3C CHз (A) A mixture of enantiomers (B) A racemic mixture (C) An achiral molecule (D) A mixture of diastereomers 58. What is the IUPAC name for this molecule? Br H3C (A) 6-bromo-3-methylcyclohexene (B) 1-bromo-4-methylcyclohex-2-ene (C) 3-bromo-6-methylcyclohexene (D) 2-bromo-5-methylcyclohexene
please answer all :) 250 Chapter 9 Chapter 9 Practice Test Which of the following reagents...
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250 Chapter 9 Chapter 9 Practice Test Which of the following reagents is the best one to use in order to wing reagents is the best one to use in order to convert methyl alcohol into methy bromide? 2. Br HBr Br NaBr Br* a. what would be the major product obtained from the reaction of the epoxide shown below containing 0.1 M HCI? CH2CH; CH CH3 b. What would be the major product obtained from...
Which statement or set of conditions listed below is not consistent with an Syl reaction pathway?...
Which statement or set of conditions listed below is not consistent with an Syl reaction pathway? O a. Neutral nucleophile work just fine. b. The leaving group is typically the conjugate base of a strong acid. O c. The rate is not dependent upon the concentration of the nucleophile. d. The temperature is relatively "cooler" to reduce competing elimination products. e. The solvent is polar and aprotic. Of. The substrate has a leaving group that is typically on a 30,...
Which statement below is true regarding substitution mechanisms at a chiral center? a. Si reactions lead to inversion of configuration at the chiral carbon and Sy2 lead to a racemic mixture. b. Both Sy2 and Syl lead to retention of configuration. c. Both Sp2 and Syl lead to inversion of configuration. d. Sn2 reactions lead to inversion of configuration at the chiral carbon and Sy1 reactions lead to retention of configuration at the chiral carbon, e. Syl reactions lead to...
1.(1 pt. each) Consider the following statements regarding Syl, SN2, E1 and E2 reactions. To which mechansims, if any, does each statement apply? If the statement can be applied to more than one mechanism, indicate each mechanism. SNI a) Involves a carbocation intermediate SNIEL b) Substitution at a stereocenter give predominantly a racemic product c) Rearrangements of the carbon skeleton are possible. EL SM d) Is greatly accelerated in protic solvents of increasing polarity SN e) Is first order in...
please answer questions 9-12
Question 9 1 pts Which of the following statements describes the reactivity of alkynes? An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. When a symmetrical internal alkyne reacts with HBr, two products are formed. Unlike alkenes, alkynes fail to undergo electrophilic addition reactions The o bonds of alkynes are greater in energy than the rt bonds and, therefore, are more reactive Alkynes react as electrophiles, whereas alkenes react as nucleophiles What is...
please help
Which of the following reactions is not correct as written? Br 1) NaOCH, major product сH, он Br 2) CH,CO Na major product сH,Cо Н Br 3) CH,CH,SNa major product DMF A 1) and 2) are incorrect 2) and 3) are incorrect C 3) is incorrect D 2) is incorrect E All are correct
Which of the following reactions is not correct as written? Br 1) NaOCH, major product сH, он Br 2) CH,CO Na major product сH,Cо...
please help in answering all of the questions
15. Which is a propagation step in the peride-initiated hydrobromination of 1 butene? (A) CH,CH:CH-CH, HBr -- CH,CH.CH,CH,Br (B) CH.CH.CH-CH,+Br - CH CH.CHCH,Br (C) CH.CH,CH,CH*+ Br-CH,CH,CH.CH, Br (D) ROOR + CH,CH,CH=CH, - RO + KOH + CHỊCH,CH,CH, 35. Indicate which C-H bond has the lowest bond dissociation enthalpy (energy)? (A) H-CH(CH), (B) H-CH (C) H-C(CH,), (D) H-CH,CH, 37 d. Predict the major product for this reaction (A) (B) BE BE (C) Br...
For the following substitution reactions, choose whether reaction A or B will proceed more quickly. If they will proceed at the same rate, put an equal sign,"=", in the box. Reaction Pair Faster? SN1 or SN2? A: CH3Br + CH30-→ CH3OCH3 + Br- B: CH3Br + CH3OH → CH3OCH3 + Br- + H+ Cl + NH3 NH + Cl + H+ B: Ya + Ho — you +C+++11+ OH + Cl + H+ I + NH3 NH2 +I+H+ SN2 ci...
1. Which of the following compounds gives the fastest Syl reaction? Br 1 Br a. 1 d. 4 c. 3 b.2 2. What is the product of the following reaction? HBr Br Br Br OH d. 4 a. 1 3. Which compound would be the major elimination product of the following reaction? NaOCH.CH ethanol a. 1 b. 2 c. 3 d. 4 4. Which of the following would you expect to have the lowest boiling point? HO -OH 3 4...
Which compound can undergo both Syl and Sy2 56. reactions? (A) H3C Br (B) H3C Br H3C "CHнз (C) (D) Br When HCI reacts with the following alkene, what major product is formed? 57. CHз HCI H3C CHз (A) A mixture of enantiomers (B) A racemic mixture (C) An achiral molecule (D) A mixture of diastereomers 58. What is the IUPAC name for this molecule? Br H3C (A) 6-bromo-3-methylcyclohexene (B) 1-bromo-4-methylcyclohex-2-ene (C) 3-bromo-6-methylcyclohexene (D) 2-bromo-5-methylcyclohexene
please answer all :)
250 Chapter 9 Chapter 9 Practice Test Which of the following reagents is the best one to use in order to wing reagents is the best one to use in order to convert methyl alcohol into methy bromide? 2. Br HBr Br NaBr Br* a. what would be the major product obtained from the reaction of the epoxide shown below containing 0.1 M HCI? CH2CH; CH CH3 b. What would be the major product obtained from...
Which statement or set of conditions listed below is not consistent with an Syl reaction pathway? O a. Neutral nucleophile work just fine. b. The leaving group is typically the conjugate base of a strong acid. O c. The rate is not dependent upon the concentration of the nucleophile. d. The temperature is relatively "cooler" to reduce competing elimination products. e. The solvent is polar and aprotic. Of. The substrate has a leaving group that is typically on a 30,...
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