The diastereomers structures for 2,3-diphenyl-2 butene are to be written and (E)-(Z) nomenclature has to be assigned. 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. Diastereomers are the stereoisomers that are not mirror images of each other and are not superimposable on each other. They possess different physical as well as chemical properties, because of difference in orientations. In alkenes , if the higher priority group on both the carbon is on the same side, configuration is termed as Z-configuration. In alkenes, if the higher priority group on both the carbon is on the opposite side, configuration is termed as E-configuration.

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Chapter FRP, Problem 9P

Interpretation Introduction

Interpretation:

The diastereomers structures for 2,3-diphenyl-2 butene are to be written and (E)-(Z) nomenclature has to be assigned.

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.

Diastereomers are the stereoisomers that are not mirror images of each other and are not superimposable on each other.

They possess different physical as well as chemical properties, because of difference in orientations.

In alkenes, if the higher priority group on both the carbon is on the same side, configuration is termed as Z-configuration.

In alkenes, if the higher priority group on both the carbon is on the opposite side, configuration is termed as E-configuration.

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