Cahn-lngold-Prelog convention

A system that works in all cases is based on the priorities of groups in the Cahn-lngold-Prelog convention (Section 5.7). This system, called the (E)-(Z) system, applies to alkene diastereomers of all types. In the (E)-(Z) system, we examine the two... 

R,S convention (Section 9.5) A method for defining the absolute configuration at chirality centers using the Cahn-lngold-Prelog sequence rules. 

When referring to a particular enantiomer, we would like to be able to specify which configuration we mean without having to draw the structure. A convention for doing this is known as the R-S or Cahn-lngold-Prelog system. Here is how it works. 

Absolute configuration (Section 5.5) The exact three-dimensional structure of a chiral molecule. Absolute configurations are specified verbally by the Cahn-lngold-Prelog R,S convention. 

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