The configuration ( R or S ) that the bottom asymmetric carbon has for the D and L series of sugars is to be stated. Concept introduction: Rules for assigning R and S configuration are as follows: The groups are prioritized on the basis of their atomic numbers . Atom with highest atomic number is assigned the first position. If the atoms that are attached to the chiral centre are similar to each other, then the priority is given on the basis of the next atom attached. The molecule is oriented in such a manner that the lowest priority group comes at the dashed wedge. If the first three high priority groups are present in a clockwise manner then the molecule is assigned R configuration but if these are present in an anticlockwise manner then the molecule is assigned with S configuration.

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Chapter 23.3B, Problem 23.5P

Interpretation Introduction

Interpretation:

The configuration (R or S) that the bottom asymmetric carbon has for the D and L series of sugars is to be stated.

Concept introduction:

Rules for assigning R and S configuration are as follows:

The groups are prioritized on the basis of their atomic numbers. Atom with highest atomic number is assigned the first position.

If the atoms that are attached to the chiral centre are similar to each other, then the priority is given on the basis of the next atom attached.

The molecule is oriented in such a manner that the lowest priority group comes at the dashed wedge.

If the first three high priority groups are present in a clockwise manner then the molecule is assigned R configuration but if these are present in an anticlockwise manner then the molecule is assigned with S configuration.

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