Chapter 13: Q. 13. 26 (page 446)

Draw the Fischer projections for $D$ -fructose and $L$ -fructose.

Short Answer

Expert verified

$D$ -Fructose and $L$ -Fructose must be drawn in Fischer projections.

Step by step solution

Introduction

The penultimate carbon of $D$ sugars is displayed in a Fischer projection with hydrogen on the left and hydroxyl on the right.
The $L$ sugars will be represented similarly, with hydrogen on the right and hydroxyl on the left.
$D$ -Fructose and $L$ -Fructose must be drawn in Fischer projections in this problem.

Explanation of D-Fructose andL-Fructose in Fischer projections.

Enantiomers are mirror images of each other, hence $D$ and L-Fructose are mirror images of each other.
D-fructose is a ketohexose, which means it has six carbons and a keto group on the right side, as well as the penultimate hydroxy group.

Structure of D-Fructose and L-Fructose in Fischer projections.

Knowing the structure of $D$ -Fructose, we can simply swap out each stereogenic centre to create $L$ -Fructose, as shown in the diagram below.

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Draw the Fischer projections for $D$ -fructose and $L$ -fructose.

Short Answer

Step by step solution

Introduction

Explanation of D-Fructose andL-Fructose in Fischer projections.

Structure of D-Fructose and L-Fructose in Fischer projections.

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Draw the Fischer projections for D-fructose and L-fructose.

Short Answer

Step by step solution

Introduction

Explanation of D-Fructose andL-Fructose in Fischer projections.

Structure of D-Fructose and L-Fructose in Fischer projections.

One App. One Place for Learning.

Most popular questions from this chapter

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Draw the Fischer projections for $D$ -fructose and $L$ -fructose.