Instructions: Read the instructions carefully and answer the following questions in the space provided. Then attach the PDF file on Discussion Board for peer discussion and peer review.
In a few sentences define each of the three main classes of isomers below. Configurational Isomers can be further classified as either enantiomers or diastereomers and should also be discussed. Your descriptions should enable your peers to quickly and easily compare and contrast the differences between the different classes of isomers.
A. Constitutional Isomers (or Structural Isomers)
B. Conformational Isomers
C. Configurational Isomers (or Stereoisomers)
I. Enantiomers
II. Diastereomers

See explanation

Explanation:

A. Constitutional or structural isomers have the same molecular formula but different structural formulas.

B. Conformational isomers are compounds having the same atom to atom connectivity but differ by rotation about one or more single bonds.

C. Stereo isomers are compounds having the same molecular mass and atom to atom connectivity but different arrangement of atoms and groups in space.

I. Enantiomers are stereo isomers (optical isomers particularly) that are non-superimposable mirror images of each other.

II. Diasteromers are optical isomers that are not mirror images of each other.

Both diasteromers and enantiomers are types of optical isomers which in turn is one of the types of stereo isomers.

Stereo isomers differ from conformational isomers in that the arrangement of atoms in stereo isomers is permanent while conformational isomers results from free rotations in molecules about single bonds.

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