(a) Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated. Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A , B , C , and D . Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

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Answer 1

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Chapter 31, Problem 31.19P

Interpretation Introduction

(a)

Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Interpretation Introduction

(b)

Interpretation: The conversion of given ball-and-stick model of androsterone to a three dimensional representation using chair cyclohexane rings is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

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(a) Draw a skeletal structure of the anabolic steroid 4-androstene-3,17-dione, also called "andro," from the following description. Andro contains the tetracyclic steroid skeieton with carbonyl groups at C3 and C17, a double bond between C4 and C5, and methyl groups bonded to C10 and C13. (b) Add wedges and dashes for all stereogenic centers with the following information: the configuration at C10 is R, the configuration at C13 is S, and all substituents at ring fusions are trans to each other.

(1) Draw the LINE-ANGLE structure of 2, 2-diiodopentane. (2) Convert this achiral compound to one chiral compound by simply changing the position of 2 atoms (or groups) in the structure.

Draw the structures of (a) 6-methyl-3-heptanol and (b) trans-2-methylcyclohexanol

Answer 2

Question

Chapter 31, Problem 31.19P

Interpretation Introduction

(a)

Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Interpretation Introduction

(b)

Interpretation: The conversion of given ball-and-stick model of androsterone to a three dimensional representation using chair cyclohexane rings is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

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Answer 3

Question

Chapter 31, Problem 31.19P

Interpretation Introduction

(a)

Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Interpretation Introduction

(b)

Interpretation: The conversion of given ball-and-stick model of androsterone to a three dimensional representation using chair cyclohexane rings is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

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Answer 4

Question

Chapter 31, Problem 31.19P

Interpretation Introduction

(a)

Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Interpretation Introduction

(b)

Interpretation: The conversion of given ball-and-stick model of androsterone to a three dimensional representation using chair cyclohexane rings is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

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Answer 5

Chapter 31, Problem 31.19P

Interpretation Introduction

(a)

Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Interpretation Introduction

(b)

Interpretation: The conversion of given ball-and-stick model of androsterone to a three dimensional representation using chair cyclohexane rings is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Answer 6

Chapter 31, Problem 31.19P

Interpretation Introduction

(a)

Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Answer 7

Chapter 31, Problem 31.19P

Interpretation Introduction

(a)

Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Answer 8

Interpretation Introduction

(b)

Interpretation: The conversion of given ball-and-stick model of androsterone to a three dimensional representation using chair cyclohexane rings is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Answer 9

Interpretation Introduction

(b)

Interpretation: The conversion of given ball-and-stick model of androsterone to a three dimensional representation using chair cyclohexane rings is to be stated.

Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as C18 and C19 respectively.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 31 - Problem 31.1 One component of jojoba oil is a wax...Ch. 31 - Problem 31.2 How would you expect the melting...Ch. 31 - Problem 31.3 Draw the products formed when...Ch. 31 - Problem 31.4 The main fatty acid component of the...Ch. 31 - Prob. 31.5P Ch. 31 - Problem 31.6 Draw the structure of a lecithin...Ch. 31 - Prob. 31.7P Ch. 31 - Problem 31.8 Why are phospholipids, but not...Ch. 31 - Problem 31.9 Explain why regularly ingesting a...Ch. 31 - Problem 31.10 Locate the isoprene units in each...

Solution Summary: The author explains how the ball-and-stick model of androsterone is converted to a skeletal structure by replacing black ball with C.

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Chapter 31 Solutions