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We have been comparing two compounds that are mirror images.
They need to have different configurations for each stereo center.
The first method for drawing enantiomers was to switch all wedges with dashes.
Every stereocenter had to be inverted for the two compounds to be enantiomers.
There is a simple case where we only have two stereocenters.
They are not the same compound.
They are not superimposable.
Both compounds have the same stereocenter configuration.
They are not enantiomers if they are not mirror images.
They are called diastereomers.
Stereoisomers are compounds that are not mirror images of each other.
The term "diastereomer" is similar to the term "enantiomer".
One compound is called the diastereomer of the other, and you can have a group of them.
They always come in pairs, never more than two.
A larger family can be formed by diastereomers.
If there are enough stereocenters to allow for many permutations of the stereocenters, we can have 100 compounds that are all diastereomers of each other.
If you are given two stereoisomers, you should be able to tell if they are diastereomers or enantiomers.
The stereocenters are all you need to see.
They have to be of different configurations for them to be enantiomers.
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