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Three-Dimensional Representations

Assigning Priorities

Determining Stereochemical Relationships

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Assigning Priorities: Naming Compounds

For molecules with multiple stereocenters, multiple double bonds, or a combination of stereocenters and double bonds, naming is done in a slightly different way. The atom number and spatial orientation for each double bond and stereocenter is given in parentheses, as follows: (atom number,orientation).

Consider the 2,6-dibromooctane molecule below.

It was determined previously that the both stereocenters have an S orientation. Therefore, the complete name for this compound is (2,S),(6,S)-dibromooctane.

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