The given conditions are to be discussed. Concept introduction: The molecules that are nonsuperimposable or not identical with their mirror images are known as chiral molecules. A pair of two mirror images that are nonidentical is known as enantiomers, which are optically active. The objects or molecules that are superimposable with their mirror images are achiral objects or molecules and these objects have a centre of symmetry or plane of symmetry. The achiral compounds in which plane of symmetry is present internally and consists of chiral centres are known as meso compounds, but they are optically inactive. The stereo formula, which is depicted in two dimensions, in which stereochemical information is not destroyed, is determined by Fisher Projection formula. The stereoisomers that are nonsuperimposable on each other and not mirror images of each other are known as diastereomers. The compounds that have the same molecular formula of atoms but the structure of the compounds are different for the positions of atoms are called isomers. In double bond or cyclic compounds, if two same functional groups are present on the same side of the double bond or cyclic compound, the given compound can be labeled as cis. If the two functional groups are present on the different sides of the double bond or cyclic compound, the given compound can be labeled as Trans. Cis-trans isomerism exists in the compounds in which similar groups are present on the adjacent carbon atoms.

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Chapter 5, Problem 27PP

Interpretation Introduction

Interpretation:

The given conditions are to be discussed.

Concept introduction:

The molecules that are nonsuperimposable or not identical with their mirror images are known as chiral molecules.

A pair of two mirror images that are nonidentical is known as enantiomers, which are optically active.

The objects or molecules that are superimposable with their mirror images are achiral objects or molecules and these objects have a centre of symmetry or plane of symmetry.

The achiral compounds in which plane of symmetry is present internally and consists of chiral centres are known as meso compounds, but they are optically inactive.

The stereo formula, which is depicted in two dimensions, in which stereochemical information is not destroyed, is determined by Fisher Projection formula.

The stereoisomers that are nonsuperimposable on each other and not mirror images of each other are known as diastereomers.

The compounds that have the same molecular formula of atoms but the structure of the compounds are different for the positions of atoms are called isomers.

In double bond or cyclic compounds, if two same functional groups are present on the same side of the double bond or cyclic compound, the given compound can be labeled as cis.

If the two functional groups are present on the different sides of the double bond or cyclic compound, the given compound can be labeled as Trans.

Cis-trans isomerism exists in the compounds in which similar groups are present on the adjacent carbon atoms.

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