(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

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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5. Ribose's structure is ОН HO ОН ОН a) Draw using the arrow formalism the reaction of linear ribose to make a 5-membered ring. b) What is the name of the resulting functional group? c) Given that reaction of alcohols (such as RCH2OH) with carbonyls (such as HCO-R') to create this functional group is typically not thermodynamically favored, why does most ribose in water exist as a 5-membered ring? A few word answer is fine. d) AG°for this reaction is about - 5 kJ/mol. Assuming that you start with a 1 mM solution of ribose in water, what is the approximate concentration at equilibrium of (i) the linear form? (ii) The cyclic form? (A good answer should be correct within 20%, e.g. it is fine to approximate 9 mM as 10 mM, but it is not okay to approximate 0.1 mM as 1 mM.) e) This reaction creates a new stereocenter. Please indicate it with a *. f) Consider the starting point for synthesis of purines like ATP, which is PRPP (pheseboribosylevOrhesehate) НО НО LOLOH HO ОН HO OH Pyrophosphate…

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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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