(a) Interpretation: The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified. Concept Introduction: The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

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Answer 1

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Chapter 19, Problem 19.47P

Interpretation Introduction

(a)

Interpretation:

The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified.

Concept Introduction:

The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

Interpretation Introduction

(b)

Interpretation:

The two functional groups in B that react to form the compound A through cyclization should be identified. The new functional group formed to close the carbon ring should be identified.

Concept Introduction:

A functional group is a combination of atoms which act together to show typical chemical reactions when present in a compound.

Cyclization refers to the chemical reaction through which one or more carbon rings are formed in a compound.

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Part II. Given two isomers: 2-methylpentane (A) and 2,2-dimethyl butane (B) answer the following: (a) match structures of isomers given their mass spectra below (spectra A and spectra B) (b) Draw the fragments given the following prominent peaks from each spectrum: Spectra A m/2 =43 and 1/2-57 spectra B m/2 = 43 (c) why is 1/2=57 peak in spectrum A more intense compared to the same peak in spectrum B. Relative abundance Relative abundance 100 A 50 29 29 0 10 -0 -0 100 B 50 720 30 41 43 57 71 4-0 40 50 60 70 m/z 43 57 8-0 m/z = 86 M 90 100 71 m/z = 86 M -O 0 10 20 30 40 50 60 70 80 -88 m/z 90 100

Part IV. C6H5 CH2CH2OH is an aromatic compound which was subjected to Electron Ionization - mass spectrometry (El-MS) analysis. Prominent m/2 values: m/2 = 104 and m/2 = 9) was obtained. Draw the structures of these fragments.

For each reaction shown below follow the curved arrows to complete each equationby showing the structure of the products. Identify the acid, the base, the conjugated acid andconjugated base. Consutl the pKa table and choose the direciton theequilibrium goes. However show the curved arrows. Please explain if possible.

Answer 2

Question

Chapter 19, Problem 19.47P

Interpretation Introduction

(a)

Interpretation:

The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified.

Concept Introduction:

The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

Interpretation Introduction

(b)

Interpretation:

The two functional groups in B that react to form the compound A through cyclization should be identified. The new functional group formed to close the carbon ring should be identified.

Concept Introduction:

A functional group is a combination of atoms which act together to show typical chemical reactions when present in a compound.

Cyclization refers to the chemical reaction through which one or more carbon rings are formed in a compound.

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Answer 3

Question

Chapter 19, Problem 19.47P

Interpretation Introduction

(a)

Interpretation:

The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified.

Concept Introduction:

The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

Interpretation Introduction

(b)

Interpretation:

The two functional groups in B that react to form the compound A through cyclization should be identified. The new functional group formed to close the carbon ring should be identified.

Concept Introduction:

A functional group is a combination of atoms which act together to show typical chemical reactions when present in a compound.

Cyclization refers to the chemical reaction through which one or more carbon rings are formed in a compound.

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Answer 4

Question

Chapter 19, Problem 19.47P

Interpretation Introduction

(a)

Interpretation:

The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified.

Concept Introduction:

The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

Interpretation Introduction

(b)

Interpretation:

The two functional groups in B that react to form the compound A through cyclization should be identified. The new functional group formed to close the carbon ring should be identified.

Concept Introduction:

A functional group is a combination of atoms which act together to show typical chemical reactions when present in a compound.

Cyclization refers to the chemical reaction through which one or more carbon rings are formed in a compound.

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Answer 5

Chapter 19, Problem 19.47P

Interpretation Introduction

(a)

Interpretation:

The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified.

Concept Introduction:

The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

Interpretation Introduction

(b)

Interpretation:

The two functional groups in B that react to form the compound A through cyclization should be identified. The new functional group formed to close the carbon ring should be identified.

Concept Introduction:

A functional group is a combination of atoms which act together to show typical chemical reactions when present in a compound.

Cyclization refers to the chemical reaction through which one or more carbon rings are formed in a compound.

Answer 6

Chapter 19, Problem 19.47P

Interpretation Introduction

(a)

Interpretation:

The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified.

Concept Introduction:

The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

Answer 7

Chapter 19, Problem 19.47P

Interpretation Introduction

(a)

Interpretation:

The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified.

Concept Introduction:

The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The two functional groups in B that react to form the compound A through cyclization should be identified. The new functional group formed to close the carbon ring should be identified.

Concept Introduction:

A functional group is a combination of atoms which act together to show typical chemical reactions when present in a compound.

Cyclization refers to the chemical reaction through which one or more carbon rings are formed in a compound.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The two functional groups in B that react to form the compound A through cyclization should be identified. The new functional group formed to close the carbon ring should be identified.

Concept Introduction:

A functional group is a combination of atoms which act together to show typical chemical reactions when present in a compound.

Cyclization refers to the chemical reaction through which one or more carbon rings are formed in a compound.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 19.1 - Prob. 19.1P Ch. 19.4 - Problem 19-2 Complete the equation for each...Ch. 19.4 - Prob. 19.3P Ch. 19 - Prob. 19.4P Ch. 19 - Write the IUPAC name for each compound.Ch. 19 - Prob. 19.6P Ch. 19 - Prob. 19.7P Ch. 19 - Prob. 19.8P Ch. 19 - Prob. 19.9P Ch. 19 - 0 Complete the equations for these reactions.

Solution Summary: The author explains that the drawings of the alternative chair conformations of A should be completed.

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