Chart of Definitions and Interrelationships of the Different Kinds of Isomers


Isomers may be:


Stereoisomers

interconversion requires changing the configurations of stereocenterscan be interconverted by rotation about σ bonds or by lone pair inversion
different internal dimensions configurational diastereomers
(cis/trans, E/Z)
conformational diastereomers
(staggered/eclipsed, anti/gauche, axial/equatorial)
nonsuperimposable mirror images configurational enantiomers conformational enantiomers

Note: The terms 'diastereomer' and 'enantiomer' refer to 'configurational diastereomer' and 'configurational enantiomer' unless otherwise specified.


You might want to look at a flow chart showing how to determine the isomeric relationship between two structures.

Or you might want to look at some examples of the different kinds of stereoisomers.

Or you might find it useful to see a glossary of stereochemical terms.


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