An orbital diagram of allene and the two perpendicular ends in orbital diagram. Interpretation: An orbital diagram of allene is to be drawn and the two perpendicular ends in orbital diagram are to be shown. Concept introduction: Allenes are the compounds in which two adjacent double bonds share the common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

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Answer 1

Question

Chapter 15.2, Problem 15.3P

(a)

Interpretation Introduction

To determine: An orbital diagram of allene and the two perpendicular ends in orbital diagram.

Interpretation: An orbital diagram of allene is to be drawn and the two perpendicular ends in orbital diagram are to be shown.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share the common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

(b)

Interpretation Introduction

To determine: The two enantionmers of penta−2,3−diene.

Interpretation: The two enantionmers of penta−2,3−diene are to be drawn.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

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Which of the statement is INCORRECT? a. The increase in stability of 2,4-hexadiene over 1,3-hexadiene is due to the increased double bond substitution of the former. b. The stabilization of dienes by conjugation is less pronounced than the aromatic stabilization of benzene. c. Resonance description in alkenes usually involves charge separation. d. Higher energy pi-orbitals often have decreasing number of nodes.

The diene shown below will NOT react in a Diels-Alder reaction. Why not? Select one: A. The compound is not a conjugated diene. B. The compound is lacking in electron withdrawing groups. O C. This compound cannot adopt the s-cis conformation. D. The compound is lacking in electron donating groups.

1. Draw the structure of (4S)-1-bromo-4-methylhexane a. Draw the substitution product that would form upon reaction with NaOCH3 in DMSO solvent. (Include stereochemistry) b. Would this reaction be SN1 or Sn2? C. Draw a detailed step-wise mechanism for this substitution reaction. Be sure to include all steps, formal charges, and show the movement of electrons with curved arrows. Draw in any lone pairs of electrons that are directly involved in the reaction. or distributed d. Draw the elimination product that would form upon reaction of (4S)-1-bromo-4- methylhexane with KOC(CH3)3 in HOC(CH3)3 solvent. (Include tereochemistry) e. Would this reaction be E1 or E2? f. y not be shar Draw a detailed step-wise mechanism for this elimination reaction. Be sure to include all steps, formal charges, and show the movement of electrons with curved arrows. Draw in any lone pairs of electrons that are directly involved in the reaction.

Answer 2

Question

Chapter 15.2, Problem 15.3P

(a)

Interpretation Introduction

To determine: An orbital diagram of allene and the two perpendicular ends in orbital diagram.

Interpretation: An orbital diagram of allene is to be drawn and the two perpendicular ends in orbital diagram are to be shown.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share the common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

(b)

Interpretation Introduction

To determine: The two enantionmers of penta−2,3−diene.

Interpretation: The two enantionmers of penta−2,3−diene are to be drawn.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

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Answer 3

Question

Chapter 15.2, Problem 15.3P

(a)

Interpretation Introduction

To determine: An orbital diagram of allene and the two perpendicular ends in orbital diagram.

Interpretation: An orbital diagram of allene is to be drawn and the two perpendicular ends in orbital diagram are to be shown.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share the common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

(b)

Interpretation Introduction

To determine: The two enantionmers of penta−2,3−diene.

Interpretation: The two enantionmers of penta−2,3−diene are to be drawn.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

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Answer 4

Question

Chapter 15.2, Problem 15.3P

(a)

Interpretation Introduction

To determine: An orbital diagram of allene and the two perpendicular ends in orbital diagram.

Interpretation: An orbital diagram of allene is to be drawn and the two perpendicular ends in orbital diagram are to be shown.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share the common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

(b)

Interpretation Introduction

To determine: The two enantionmers of penta−2,3−diene.

Interpretation: The two enantionmers of penta−2,3−diene are to be drawn.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

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Answer 5

Chapter 15.2, Problem 15.3P

(a)

Interpretation Introduction

To determine: An orbital diagram of allene and the two perpendicular ends in orbital diagram.

Interpretation: An orbital diagram of allene is to be drawn and the two perpendicular ends in orbital diagram are to be shown.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share the common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

(b)

Interpretation Introduction

To determine: The two enantionmers of penta−2,3−diene.

Interpretation: The two enantionmers of penta−2,3−diene are to be drawn.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

Answer 6

Chapter 15.2, Problem 15.3P

(a)

Interpretation Introduction

To determine: An orbital diagram of allene and the two perpendicular ends in orbital diagram.

Interpretation: An orbital diagram of allene is to be drawn and the two perpendicular ends in orbital diagram are to be shown.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share the common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

Answer 7

Chapter 15.2, Problem 15.3P

(a)

Interpretation Introduction

To determine: An orbital diagram of allene and the two perpendicular ends in orbital diagram.

Interpretation: An orbital diagram of allene is to be drawn and the two perpendicular ends in orbital diagram are to be shown.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share the common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

Answer 8

(b)

Interpretation Introduction

To determine: The two enantionmers of penta−2,3−diene.

Interpretation: The two enantionmers of penta−2,3−diene are to be drawn.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

Answer 9

(b)

Interpretation Introduction

To determine: The two enantionmers of penta−2,3−diene.

Interpretation: The two enantionmers of penta−2,3−diene are to be drawn.

Concept introduction: Allenes are the compounds in which two adjacent double bonds share common carbon atoms. These are also known as cumulative dienes. Cumulative dienes are different from conjugated dienes because conjugated dienes comprise double bonds separated by one single bond.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 15.2 - Prob. 15.1P Ch. 15.2 - Prob. 15.2P Ch. 15.2 - Prob. 15.3P Ch. 15.4 - Prob. 15.4P Ch. 15.4 - Prob. 15.5P Ch. 15.5 - Treatment of an alkyl halide with AgNO3 in alcohol...Ch. 15.5 - Propose a mechanism for each reaction, showing...Ch. 15.6 - When Br2 is added to buta-1,3-diene at 15 C, the...Ch. 15.7 - Prob. 15.9P Ch. 15.7 - When N-bromosuccinimide is added to hex-1-ene in...

Solution Summary: The author explains that Allenes are the compounds in which two adjacent double bonds share common carbon atoms. They are also known as cumulative dienes.

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