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Which of the following carbocations is most likely to undergoe a rearrangement? ( Hint: Remember that...
D) Br 6. Which of the following alkyl bromides is likely to undergo rearrangement by a...
D) Br 6. Which of the following alkyl bromides is likely to undergo rearrangement by a 1, 2-methyl shift during an Sy1 or El reaction (both reaction mechanisms form a carbocation)? A) benzylł bromide B) 2 -bromo 3-ethytpentane C) 3-bromo-3-methylpentane D) 2-bromo-3, 3-dimethylpentane r is untrue about the rate of an E2 elimination of an alky
Question 41 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through...
Question 41 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? H2C CH3 H3C CH3 H3C CH3 III a) both II and III Ob) both I and II Oc) Od) Question 42 (2 points) For the reaction shown, select the expected major organic product. 1. 1 eq HCI 2. 1 eq HBr Br. CI -Br -CI Ha CI Br + enantiomer + enantiomer + enantiomer CI Br + enantiomer IV 11 III...
Which of the following alkyl halides is likely to undergo rearrangement by a 1, 2- methyl...
Which of the following alkyl halides is likely to undergo rearrangement by a 1, 2- methyl shift? A) 3-bromo-3-methylpentane B) 2-chloro-3, 3-dimethylpentane C) 3-bromo-2, 3-dimethylpentane D) 2-iodo-2-methylpentane Which of the following alkyl halides is the worst substrate for the Sn2 reaction? A) Br B) Br C) Br D) Br In the mechanism for the reaction shown below, the first curved arrow moves from_ to Н. CH3CH2NH2 H3C + CH3 A) carbon (in CH3CH2NH2) to oxygen B) oxygen to nitrogen C)...
Question 9 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through...
Question 9 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? HC CH HC CH H₃C. CH INI a) both I and II b) both II and III OI d) 1 Question 10 (2 points) Choose a major product for the reaction below 0 Cl/AICI OCH, CI OCH OCH OCH a) I, II and Ill b) d)
Question 47 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through...
Question 47 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? нус CH HC CH нус CH oa) both II and III ob) oc) 11 od) both I and II Question 48 (2 points) For the reaction shown, select the expected major organic product. 1. 1 e HCI 2 1 e HBO Ho Br + enantiomer + enantiomer + enantiomer + enantiomer IV 11 HI! Oa) 1 ob) 11 Oc) III od)...
Give the organic product: Is the configuration of the following molecule R or S? 0-C,HS ?...
Give the organic product: Is the configuration of the following molecule R or S? 0-C,HS ? H A B D O A. R B.S ОА OB C. Neither, there is no chirality center present. OD Which of the following carbocations is most likely to undergoe a rearrangement? .....Hint: Remember that a 1,2-shift can involve a shift of Hor-R) What is the organic product formed in the following reaction? (One of the listed choices, I - IV, is correct) H-S-CH II...
10. Which of the following cations is most likely to undergo rearrangement? Is the rearrangement a...
10. Which of the following cations is most likely to undergo rearrangement? Is the rearrangement a methyl shift or hydride shift? A. O L c. Yo Do
S. Rank the following cations in order of stability (most stable first): 9. Carbocations from alkyl...
S. Rank the following cations in order of stability (most stable first): 9. Carbocations from alkyl halides are 10. Why SN1 reactions on alkyl halides having the halogen bound to a chiral carbon are normally accompanied by racemisation, while SN2 reactions on such alkyl halides result in inversion of configuration? Explain by ta king suitable examples
1. Which of the following structures is/are a secondary alkyl halide? (a) I and II (b)...
1. Which of the following structures is/are a secondary alkyl
halide? (a) I and II (b) II and V (c) I, II and V (d) IV only (e)
I, II and III 2. Which of the following is/are aprotic solvent(s)?
Choose all correct answers. (a) (b) (c) (d) (e) (f) 3. Which of the
following carbocations, if formed, is (are) likely to undergo
rearrangement through a hydride shift? (a) I (b) II (c) III (d) I
and II (e) II...
6. Which of the following carbocations would NOT be likely to undergo rearrangement? A) CH3CHCHCH3 CH3...
6. Which of the following carbocations would NOT be likely to undergo rearrangement? A) CH3CHCHCH3 CH3 CH3 B) CH3CHOCH3 CH3 CH C) CH3CCH2 CH3 D) CH3 CH3CHCH2 E) CH3 CH3CCHCH2CH3 CH3 7. Which alcohol would initially produce the most stable carbocation when treated with concentrated H2SO4? A) CH3 CH3CCH2 CH3 он CH3 B) CH3CHCHCH3 он CH3 C) CH3CHCH2CH2OH CH3 D) HOCH2 CHCH2CH3 E) CH2 OH CH3CHCH2CH3 Page 4
D) Br 6. Which of the following alkyl bromides is likely to undergo rearrangement by a 1, 2-methyl shift during an Sy1 or El reaction (both reaction mechanisms form a carbocation)? A) benzylł bromide B) 2 -bromo 3-ethytpentane C) 3-bromo-3-methylpentane D) 2-bromo-3, 3-dimethylpentane r is untrue about the rate of an E2 elimination of an alky
Question 41 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? H2C CH3 H3C CH3 H3C CH3 III a) both II and III Ob) both I and II Oc) Od) Question 42 (2 points) For the reaction shown, select the expected major organic product. 1. 1 eq HCI 2. 1 eq HBr Br. CI -Br -CI Ha CI Br + enantiomer + enantiomer + enantiomer CI Br + enantiomer IV 11 III...
Which of the following alkyl halides is likely to undergo rearrangement by a 1, 2- methyl shift? A) 3-bromo-3-methylpentane B) 2-chloro-3, 3-dimethylpentane C) 3-bromo-2, 3-dimethylpentane D) 2-iodo-2-methylpentane Which of the following alkyl halides is the worst substrate for the Sn2 reaction? A) Br B) Br C) Br D) Br In the mechanism for the reaction shown below, the first curved arrow moves from_ to Н. CH3CH2NH2 H3C + CH3 A) carbon (in CH3CH2NH2) to oxygen B) oxygen to nitrogen C)...
Question 9 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? HC CH HC CH H₃C. CH INI a) both I and II b) both II and III OI d) 1 Question 10 (2 points) Choose a major product for the reaction below 0 Cl/AICI OCH, CI OCH OCH OCH a) I, II and Ill b) d)
Question 47 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? нус CH HC CH нус CH oa) both II and III ob) oc) 11 od) both I and II Question 48 (2 points) For the reaction shown, select the expected major organic product. 1. 1 e HCI 2 1 e HBO Ho Br + enantiomer + enantiomer + enantiomer + enantiomer IV 11 HI! Oa) 1 ob) 11 Oc) III od)...
Give the organic product: Is the configuration of the following molecule R or S? 0-C,HS ? H A B D O A. R B.S ОА OB C. Neither, there is no chirality center present. OD Which of the following carbocations is most likely to undergoe a rearrangement? .....Hint: Remember that a 1,2-shift can involve a shift of Hor-R) What is the organic product formed in the following reaction? (One of the listed choices, I - IV, is correct) H-S-CH II...
10. Which of the following cations is most likely to undergo rearrangement? Is the rearrangement a methyl shift or hydride shift? A. O L c. Yo Do
S. Rank the following cations in order of stability (most stable first): 9. Carbocations from alkyl halides are 10. Why SN1 reactions on alkyl halides having the halogen bound to a chiral carbon are normally accompanied by racemisation, while SN2 reactions on such alkyl halides result in inversion of configuration? Explain by ta king suitable examples
1. Which of the following structures is/are a secondary alkyl
halide? (a) I and II (b) II and V (c) I, II and V (d) IV only (e)
I, II and III 2. Which of the following is/are aprotic solvent(s)?
Choose all correct answers. (a) (b) (c) (d) (e) (f) 3. Which of the
following carbocations, if formed, is (are) likely to undergo
rearrangement through a hydride shift? (a) I (b) II (c) III (d) I
and II (e) II...
6. Which of the following carbocations would NOT be likely to undergo rearrangement? A) CH3CHCHCH3 CH3 CH3 B) CH3CHOCH3 CH3 CH C) CH3CCH2 CH3 D) CH3 CH3CHCH2 E) CH3 CH3CCHCH2CH3 CH3 7. Which alcohol would initially produce the most stable carbocation when treated with concentrated H2SO4? A) CH3 CH3CCH2 CH3 он CH3 B) CH3CHCHCH3 он CH3 C) CH3CHCH2CH2OH CH3 D) HOCH2 CHCH2CH3 E) CH2 OH CH3CHCH2CH3 Page 4
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