FUNDAMENTALS OF BIOCHEM.-NEXTGEN ACCESS
FUNDAMENTALS OF BIOCHEM.-NEXTGEN ACCESS
5th Edition
ISBN: 9781119661450
Author: Voet
Publisher: WILEY
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Chapter 8, Problem 1E

(a)

Summary Introduction

To determine: The number of stereoisomers possible for a ketopentose.

Concept introduction:

Stereoisomers are the pair of compounds which have the same atom and same chemical formula, but differ in the spatial arrangement of their atoms. One of the pairs of stereoisomers is known as epimer.

(a)

Expert Solution
Check Mark

Answer to Problem 1E

Correct answer: The number of stereoisomers possible for a ketopentose is 4.

Explanation of Solution

Explanation:

The formula to calculate the number of stereoisomers in a given carbohydrate is 2n, where n= number of chiral carbons.

The ketopentose contains two chiral atoms. Therefore, the number of stereoisomers will be 22 = 4.

(b)

Summary Introduction

To determine: The number of stereoisomers possible for a ketohexose.

Concept introduction:

Stereoisomers are the pair of compounds which have the same atom and same chemical formula, but differ in the spatial arrangement of their atoms. One of the pairs of stereoisomers is known as an epimer.

(b)

Expert Solution
Check Mark

Answer to Problem 1E

Correct answer: The number of stereoisomers possible for a ketohexose is 8.

Explanation of Solution

Explanation:

The formula to calculate the number of stereoisomers in a given carbohydrate is 2n, where n= number of chiral carbons.

The ketohexose contains three chiral atoms. Therefore, the number of stereoisomers will be 23 = 8.

(c)

Summary Introduction

To determine: The number of stereoisomers possible for a ketoheptose.

Concept introduction:

Stereoisomers refer to the pair of compounds which have the same atom and same chemical formula, but differ in the spatial arrangement of their atoms. One of the pairs of stereoisomers is known as epimer.

(c)

Expert Solution
Check Mark

Answer to Problem 1E

Correct answer: The number of stereoisomers possible for a ketoheptose is 16.

Explanation of Solution

Explanation:

The formula to calculate the number of stereoisomers in a given carbohydrate is 2n, where, n= number of chiral carbons.

The ketoheptose contains four chiral atoms. Therefore, the number of stereoisomers will be 24 = 16.

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