(a) Interpretation: In the R , S system the α − carbon configuration of L- cysteine is to be stated. Concept introduction: The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

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Answer 1

Question

Chapter 27, Problem 27.26P

Interpretation Introduction

(a)

Interpretation:

In the R,S system the α− carbon configuration of L- cysteine is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Interpretation Introduction

(b)

Interpretation:

The reason as to why L− cysteine and L− serine have a different configuration in the R,S system is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

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Students have asked these similar questions

Indicate whether each statement is true or false. (a) Tryptophan is an aromatic amino acid. (b) Lysine is positively charged at pH 7. (c) Asparagine has two amide bonds. (d) Isoleucine and leucine are enantiomers. (e) Valine is probably more water-soluble than arginine.

h) Specify the absolute (R/S) configuration of the amino group in structure IV. (i) If the substituents in structures I, IV and V were identical (all OH or all NH2), which structure would result in a meso compound? (j) If each hydroxy group for structures I, II and VI were replaced with another amino group, which compound would be made optically inactive?

(a) What is the difference between the hormones progesterone and testosterone? (b) Draw the structure of a a steroid nucleus. (c) Give the products obtained from complete base hydrolysis in the following reaction: O || CH,−O−C−(CH2)14–CH3 O CH–0–C−(CH2)14—CH3 + 3 NaOH O CH,−0–C−(CH2)14–CH3

Answer 2

Question

Chapter 27, Problem 27.26P

Interpretation Introduction

(a)

Interpretation:

In the R,S system the α− carbon configuration of L- cysteine is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Interpretation Introduction

(b)

Interpretation:

The reason as to why L− cysteine and L− serine have a different configuration in the R,S system is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

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Answer 3

Question

Chapter 27, Problem 27.26P

Interpretation Introduction

(a)

Interpretation:

In the R,S system the α− carbon configuration of L- cysteine is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Interpretation Introduction

(b)

Interpretation:

The reason as to why L− cysteine and L− serine have a different configuration in the R,S system is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

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Answer 4

Question

Chapter 27, Problem 27.26P

Interpretation Introduction

(a)

Interpretation:

In the R,S system the α− carbon configuration of L- cysteine is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Interpretation Introduction

(b)

Interpretation:

The reason as to why L− cysteine and L− serine have a different configuration in the R,S system is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

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Answer 5

Chapter 27, Problem 27.26P

Interpretation Introduction

(a)

Interpretation:

In the R,S system the α− carbon configuration of L- cysteine is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Interpretation Introduction

(b)

Interpretation:

The reason as to why L− cysteine and L− serine have a different configuration in the R,S system is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Answer 6

Chapter 27, Problem 27.26P

Interpretation Introduction

(a)

Interpretation:

In the R,S system the α− carbon configuration of L- cysteine is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Answer 7

Chapter 27, Problem 27.26P

Interpretation Introduction

(a)

Interpretation:

In the R,S system the α− carbon configuration of L- cysteine is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The reason as to why L− cysteine and L− serine have a different configuration in the R,S system is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The reason as to why L− cysteine and L− serine have a different configuration in the R,S system is to be stated.

Concept introduction:

The absolute configuration of a molecule is a spatial arrangement of atoms. It is represented by two terms R and S where R refers to rectus and S refers to sinister. Whether the molecule is assigned either R or S configuration is based Cahn-Ingold-Prelog rule. It is based on the priority order of the substituents which is based on the atomic number. If the priority order is clockwise then it is assigned R configuration otherwise S configuration. Also, the lowest priority group is kept away from the observer.

Answer 10

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Answer 13

Ch. 27 - Prob. 27.1P Ch. 27 - Prob. 27.2P Ch. 27 - Prob. 27.3P Ch. 27 - Prob. 27.4P Ch. 27 - Prob. 27.5P Ch. 27 - Prob. 27.6P Ch. 27 - Prob. 27.8P Ch. 27 - Prob. 27.9P Ch. 27 - Prob. 27.10P Ch. 27 - Prob. 27.11P

Solution Summary: The author explains that the absolute configuration of a molecule is represented by two terms: R and S.

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