The structural formulas of the two stereoisomers formed by the photochemical chlorination of 1,2-dibromoethane are to be written. The stereoisomers are to be identified as enantiomers or diastereomers and chiral or achiral. The formation of equal amounts of stereoisomers is to be explained. Concept introduction: Enantiomers have the same connectivity of the atoms, but they have different arrangement of the atoms in space. They contain chiral centers and they are non-superimposable mirror images of each other. Diastereoisomers are the stereoisomers but they are not the enantiomers with each other. When one chirality center is present a molecule with no element of symmetry is said to be chiral molecule. The ratio of the monochlorination products depends on the type of hydrogen that is abstracted by the chlorine atom and the free radical that is formed.

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Chapter 10, Problem 23P

Interpretation Introduction

Interpretation:

The structural formulas of the two stereoisomers formed by the photochemical chlorination of 1,2-dibromoethane are to be written. The stereoisomers are to be identified as enantiomers or diastereomers and chiral or achiral. The formation of equal amounts of stereoisomers is to be explained.

Concept introduction:

Enantiomers have the same connectivity of the atoms, but they have different arrangement of the atoms in space. They contain chiral centers and they are non-superimposable mirror images of each other.

Diastereoisomers are the stereoisomers but they are not the enantiomers with each other.

When one chirality center is present a molecule with no element of symmetry is said to be chiral molecule.

The ratio of the monochlorination products depends on the type of hydrogen that is abstracted by the chlorine atom and the free radical that is formed.

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