(a) Interpretation: A curved arrow mechanism for the biosynthesis of S-adenosylmethionine in which the amino acid methionine undergoes an enzyme-catalyzed reaction with ATP to give SAM and triphosphate, assuming it is an S N 2 process is to be drawn. Concept Introduction: S N 2 reaction mechanism is a one step process. The nucleophile attacks the substrate from the backside, and the leaving group departs from the opposite side, simultaneously.

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Answer 1

Question

Chapter 25, Problem 25.15P

Interpretation Introduction

(a)

Interpretation:

A curved arrow mechanism for the biosynthesis of S-adenosylmethionine in which the amino acid methionine undergoes an enzyme-catalyzed reaction with ATP to give SAM and triphosphate, assuming it is an SN2 process is to be drawn.

Concept Introduction:

SN2 reaction mechanism is a one step process. The nucleophile attacks the substrate from the backside, and the leaving group departs from the opposite side, simultaneously.

Interpretation Introduction

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.

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Biphenyl has the following structure.(a) Is biphenyl a (fused) polynuclear aromatic hydrocarbon?(b) How many pi electrons are there in the two aromatic rings of biphenyl? How does this number compare with that for naphthalene?(c) The heat of hydrogenation for biphenyl is about 418 kJ>mol (100 kcal>mol). Calculate theresonance energy of biphenyl.(d) Compare the resonance energy of biphenyl with that of naphthalene and with that of two benzene rings. Explain thedifference in the resonance energies of naphthalene and biphenyl.

The name of the parent six-membered sulfur-containing heterocycle is thiane. It is numbered beginning at sulfur. Multiple incorporation of sulfur in the ring is indicated by the prefixes di-, tri-, and so on. (a) How many methyl-substituted thianes are there? Which ones are chiral? (b) Write structural formulas for 1,4-dithiane and 1,3,5-trithiane. (c) Which dithiane isomer (1,2-, 1,3-, or 1,4-) is a disulfide?(d) Draw the two most stable conformations of the sulfoxide derived from thiane.

6) Which is the organic product for the following reaction? (a) (b) (c) (d) сон COOH ОН ОН COOH COOH KMnO4 H2O

Answer 2

Question

Chapter 25, Problem 25.15P

Interpretation Introduction

(a)

Interpretation:

A curved arrow mechanism for the biosynthesis of S-adenosylmethionine in which the amino acid methionine undergoes an enzyme-catalyzed reaction with ATP to give SAM and triphosphate, assuming it is an SN2 process is to be drawn.

Concept Introduction:

SN2 reaction mechanism is a one step process. The nucleophile attacks the substrate from the backside, and the leaving group departs from the opposite side, simultaneously.

Interpretation Introduction

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.

Expert Solution & Answer

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See solution

Answer 3

Question

Chapter 25, Problem 25.15P

Interpretation Introduction

(a)

Interpretation:

A curved arrow mechanism for the biosynthesis of S-adenosylmethionine in which the amino acid methionine undergoes an enzyme-catalyzed reaction with ATP to give SAM and triphosphate, assuming it is an SN2 process is to be drawn.

Concept Introduction:

SN2 reaction mechanism is a one step process. The nucleophile attacks the substrate from the backside, and the leaving group departs from the opposite side, simultaneously.

Interpretation Introduction

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.

Expert Solution & Answer

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See solution

Answer 4

Question

Chapter 25, Problem 25.15P

Interpretation Introduction

(a)

Interpretation:

A curved arrow mechanism for the biosynthesis of S-adenosylmethionine in which the amino acid methionine undergoes an enzyme-catalyzed reaction with ATP to give SAM and triphosphate, assuming it is an SN2 process is to be drawn.

Concept Introduction:

SN2 reaction mechanism is a one step process. The nucleophile attacks the substrate from the backside, and the leaving group departs from the opposite side, simultaneously.

Interpretation Introduction

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.

Expert Solution & Answer

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Answer 5

Chapter 25, Problem 25.15P

Interpretation Introduction

(a)

Interpretation:

A curved arrow mechanism for the biosynthesis of S-adenosylmethionine in which the amino acid methionine undergoes an enzyme-catalyzed reaction with ATP to give SAM and triphosphate, assuming it is an SN2 process is to be drawn.

Concept Introduction:

SN2 reaction mechanism is a one step process. The nucleophile attacks the substrate from the backside, and the leaving group departs from the opposite side, simultaneously.

Interpretation Introduction

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.

Answer 6

Chapter 25, Problem 25.15P

Interpretation Introduction

(a)

Interpretation:

A curved arrow mechanism for the biosynthesis of S-adenosylmethionine in which the amino acid methionine undergoes an enzyme-catalyzed reaction with ATP to give SAM and triphosphate, assuming it is an SN2 process is to be drawn.

Concept Introduction:

SN2 reaction mechanism is a one step process. The nucleophile attacks the substrate from the backside, and the leaving group departs from the opposite side, simultaneously.

Answer 7

Chapter 25, Problem 25.15P

Interpretation Introduction

(a)

Interpretation:

A curved arrow mechanism for the biosynthesis of S-adenosylmethionine in which the amino acid methionine undergoes an enzyme-catalyzed reaction with ATP to give SAM and triphosphate, assuming it is an SN2 process is to be drawn.

Concept Introduction:

SN2 reaction mechanism is a one step process. The nucleophile attacks the substrate from the backside, and the leaving group departs from the opposite side, simultaneously.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.

Answer 10

Expert Solution & Answer

Answer 11

Expert Solution & Answer

Answer 12

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Answer 13

Ch. 25 - Prob. 25.1P Ch. 25 - Prob. 25.2P Ch. 25 - Prob. 25.3P Ch. 25 - Prob. 25.4P Ch. 25 - Prob. 25.5P Ch. 25 - Prob. 25.6P Ch. 25 - Prob. 25.7P Ch. 25 - Prob. 25.8P Ch. 25 - Prob. 25.9P Ch. 25 - Prob. 25.10P

Solution Summary: The author explains the curved arrow mechanism for the biosynthesis of S-adenosylmethionine. The nucleophile attacks the substrate from the backside, and the leaving group departs.

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.

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Chapter 25 Solutions

Solution Summary: The author explains the curved arrow mechanism for the biosynthesis of S-adenosylmethionine. The nucleophile attacks the substrate from the backside, and the leaving group departs.

(b) Interpretation: The role of Mg2+ ions in the catalytic process is to be explained. Concept Introduction: A species which stabilizes the products of a reaction is useful by neutralizing the charge.

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Chapter 25 Solutions

(b)

Interpretation:

The role of Mg2+ ions in the catalytic process is to be explained.

Concept Introduction:

A species which stabilizes the products of a reaction is useful by neutralizing the charge.