Stereochemistry is defined as the study of the three-dimensional structure of molecules. Stereochemical considerations are important in both isomerism and studies of the mechanisms of chemical reactions. Implicit in a mechanism is the stereochemistry of the reaction: in other words, the relative three-dimensional orientation of the reacting particles at any time in the reaction.

Concentrating on organic chemistry, chapters deal mainly with definitions of terms such as chirality, enantiomers,  diastereoisomers and racemisation complete with suitable examples to illustrate key concepts. Use of a polarimeter and associated definitions are described, together with two different  conventions D, L and R, S for specification of configuration. Chirality without a stereogenic centre, , in molecules such as allenes for example, is also covered.

The conventions E, Z for sp² hybridised carbons as found in alkenes are discussed.