ORGANIC CHEM +SG +SAPLING >IP<
ORGANIC CHEM +SG +SAPLING >IP<
6th Edition
ISBN: 9781319171179
Author: LOUDON
Publisher: MAC HIGHER
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Chapter 6, Problem 6.11P
Interpretation Introduction

(a)

Interpretation:

The line-and-wedge formula of (S)-(+)-ibuprofen is to be drawn.

Concept introduction:

The naming of the chiral center and geometric isomers are based on Cahn-Ingold-Prelog priority rules. If the priority assigned to each group attached to the chiral center in a molecule is in a clockwise direction, then it is the R-stereoisomer, and if this is counter-clockwise, then it is the S-stereoisomer. R and S-stereoisomer are mirror images of each other.

Interpretation Introduction

(b)

Interpretation:

The specific rotation of pure (S)-(+)-ibuprofen and pure (R)-()-ibuprofen is to be calculated.

Concept introduction:

A carbon atom that has four nonequivalent atoms or groups attached to it is known as the chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers. A chiral molecule is an optically active molecule. It rotates the plane of a plane polarized light. The enantiomeric excess of a sample is given as,

EE=100%×[α]mixture[α]pure

Interpretation Introduction

(c)

Interpretation:

The percentage of each enantiomer present in the given sample is to be calculated.

Concept introduction:

A carbon atom that has four nonequivalent atoms or groups attached to it is known as the chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers. A chiral molecule is an optically active molecule. It rotates the plane of a plane polarized light. The enantiomeric excess of a sample is given as,

EE=100%×[α]mixture[α]pure

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