Homework Answers
Since the Cl- has an equal probability of attacking the carbocation either from the front or the back, a mixture of racemic mixture is obtained. Therefore, the last option is the correct answer.
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Q 5.5: When the alkene below undergoes an ionic addition with HCI which of the following...
2. (a) When the alkene below is treated with HCI, the major product obtained has the...
2. (a) When the alkene below is treated with HCI, the major product obtained has the chloride on the less substituted carbon. Draw a mechanism for this reaction and provide an explanation for the observed regiochemistry. HCI (b) Provide a mechanism for the following transformation. НBr но- Br (c) Provide a mechanism for the following transformation 2 Он
Question 4 (1 point) Which of the following statements is true? HCI addition of an alkene...
Question 4 (1 point) Which of the following statements is true? HCI addition of an alkene goes through a tetrahedral intermediate OHCl addition of an alkene goes through a trigonal bipyramidal transition state HCl addition of an alkene goes through a carbocation transition state OHCl addition of an alkene goes through a carbocation intermediate
How many alkene products can be formed when the alkyl iodide shown below undergoes E1 elimination?...
How many alkene products can be formed when the alkyl iodide
shown below undergoes E1 elimination?
9. How many alkene products can be formed when the alkyl iodide shown below undergoes El elimination? CH3 CH CH A) 1 B) 2 C) 3 D) 4 E) 5
Which of the solutions listed below would be optically inactive? Select all that applies. a. A...
Which of the solutions listed below would be optically inactive? Select all that applies. a. A solution of a meso compound. b. A solution of a single enantiomer. C. A solution of an achiral organic compound. d. A racemic mixture
Which of the following addition reactions are stereospecific? (a) Cl2 addition to a disubstituted alkene (b)...
Which of the following addition reactions are stereospecific? (a) Cl2 addition to a disubstituted alkene (b) HBr addition to a trisubstituted alkene (c) Radical addition of Cl2 to CH4 (d) Oxidation of a trisubstituted alkenes by using O3, Zn and H2O (e) Two of the above
Ciru3 2) H20, dil. aq. HCI QUESTION 10 2 points Which compound below is suitable for...
Ciru3 2) H20, dil. aq. HCI QUESTION 10 2 points Which compound below is suitable for conversion to a Grignard reagent? 0= olog.com OCH3 OH CH, D) ОА What is the nature of the product in the following reaction? 1) LIAIHA | THỰC. a = NOI 2) H20, dil, aq. HCI o mixture of diastereomers meso compound single enantiomer racemic mixture QUESTION 5 2 points We were unable to transcribe this image
Q-Pinenone is an oxidation product produced from rosemary oil. Questions 1 - 5 pertain to Q-pinenone....
Q-Pinenone is an oxidation product produced from rosemary oil. Questions 1 - 5 pertain to Q-pinenone. 1. The alkene in a-pinenone is best described as: (A) tertiary (B) Si (C) E (D) Z (E) Re 2. How many chirality centres (stereocentres) are there in a-pinenone? (A) O (B) 1 (C) 2 (D) 3 (E) 4 - pinenone 3. Oxidation of a-pinenone using OsO4 (cat)/NMO would lead to which of the following? (A) A mixture of diastereomers (B) An optically active...
10. In which of the following reactions can rearrangements occur? A. The addition of Br and...
10. In which of the following reactions can rearrangements occur? A. The addition of Br and H,O to an alkene. B. The addition of Br to an alkene. C. The addition of H O to an alkene in the presence of HSO D. Rearrangements can occur in all of the abovelreactions. 11. Which of the following alkenes reacts the fastest with HCI? A. D. utc for hier P MacBook A
Which of the following is true of the mechanism of BH3 addition to an alkene? Select...
Which of the following is true of the mechanism of
BH3 addition to an alkene?
Select one:
a. BH3 adds to alkene by formation of a
strained 3-membered ring intermediate.
b. B-H adds to C=C in a concerted, SYN
addition.
c. B-H adds to C=C in a step-wise, SYN
addition.
d. B-H attaches to alkene with ANTI
stereochemistry.
What is the organic product formed in the following sequence of reactions? CH2 (1) HgOAcz + H2O V (2) NaBH4 2) NAB...
Which of the following substituents will have a greater influence on shown below? the s x-...
Which of the following substituents will have a greater influence on shown below? the s x- Me Me Consider the alkene below. If it has a pre-existing chiral center at either A, B or C (not all three would be substituted at the same time), which position (A,B or C) would you expect to have the greatest influence on the stereochemical outcome of the reaction to sa QUESTION 3 When two achiral reagents are reacted what is the outcome? Unequal...
2. (a) When the alkene below is treated with HCI, the major product obtained has the chloride on the less substituted carbon. Draw a mechanism for this reaction and provide an explanation for the observed regiochemistry. HCI (b) Provide a mechanism for the following transformation. НBr но- Br (c) Provide a mechanism for the following transformation 2 Он
Question 4 (1 point) Which of the following statements is true? HCI addition of an alkene goes through a tetrahedral intermediate OHCl addition of an alkene goes through a trigonal bipyramidal transition state HCl addition of an alkene goes through a carbocation transition state OHCl addition of an alkene goes through a carbocation intermediate
How many alkene products can be formed when the alkyl iodide
shown below undergoes E1 elimination?
9. How many alkene products can be formed when the alkyl iodide shown below undergoes El elimination? CH3 CH CH A) 1 B) 2 C) 3 D) 4 E) 5
Which of the solutions listed below would be optically inactive? Select all that applies. a. A solution of a meso compound. b. A solution of a single enantiomer. C. A solution of an achiral organic compound. d. A racemic mixture
Which of the following addition reactions are stereospecific? (a) Cl2 addition to a disubstituted alkene (b) HBr addition to a trisubstituted alkene (c) Radical addition of Cl2 to CH4 (d) Oxidation of a trisubstituted alkenes by using O3, Zn and H2O (e) Two of the above
Ciru3 2) H20, dil. aq. HCI QUESTION 10 2 points Which compound below is suitable for conversion to a Grignard reagent? 0= olog.com OCH3 OH CH, D) ОА What is the nature of the product in the following reaction? 1) LIAIHA | THỰC. a = NOI 2) H20, dil, aq. HCI o mixture of diastereomers meso compound single enantiomer racemic mixture QUESTION 5 2 points We were unable to transcribe this image
Q-Pinenone is an oxidation product produced from rosemary oil. Questions 1 - 5 pertain to Q-pinenone. 1. The alkene in a-pinenone is best described as: (A) tertiary (B) Si (C) E (D) Z (E) Re 2. How many chirality centres (stereocentres) are there in a-pinenone? (A) O (B) 1 (C) 2 (D) 3 (E) 4 - pinenone 3. Oxidation of a-pinenone using OsO4 (cat)/NMO would lead to which of the following? (A) A mixture of diastereomers (B) An optically active...
10. In which of the following reactions can rearrangements occur? A. The addition of Br and H,O to an alkene. B. The addition of Br to an alkene. C. The addition of H O to an alkene in the presence of HSO D. Rearrangements can occur in all of the abovelreactions. 11. Which of the following alkenes reacts the fastest with HCI? A. D. utc for hier P MacBook A
Which of the following is true of the mechanism of
BH3 addition to an alkene?
Select one:
a. BH3 adds to alkene by formation of a
strained 3-membered ring intermediate.
b. B-H adds to C=C in a concerted, SYN
addition.
c. B-H adds to C=C in a step-wise, SYN
addition.
d. B-H attaches to alkene with ANTI
stereochemistry.
What is the organic product formed in the following sequence of reactions? CH2 (1) HgOAcz + H2O V (2) NaBH4 2) NAB...
Which of the following substituents will have a greater influence on shown below? the s x- Me Me Consider the alkene below. If it has a pre-existing chiral center at either A, B or C (not all three would be substituted at the same time), which position (A,B or C) would you expect to have the greatest influence on the stereochemical outcome of the reaction to sa QUESTION 3 When two achiral reagents are reacted what is the outcome? Unequal...
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