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I am doing a presentation regarding Stereochemistry, and I am a little confused with the terminology. My question is:

Are isomers and stereoisomers the same thing? Do they differ from each other?

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    $\begingroup$ A stereoisomer is a class of isomers. There are others such as enantiomers, diastereomers etc. $\endgroup$ – Technetium Jan 9 '16 at 11:16
  • $\begingroup$ Both enantiomers and diastereomers are subsets of stereoisomers, I would not say that they are "separate classes" from stereoisomers. However there are isomers that are not stereoisomers; a simple example is dimethyl ether vs ethanol: an example of functional group isomerism $\endgroup$ – orthocresol Jan 9 '16 at 12:03

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