Key Concepts—Stereochemistry

Isomers Are Different Compounds with the Same Molecular Formula (5.2,5.11) 

A plane of symmetry makes these compounds achiral. 

Optical Activity Is the Ability of a Compound to Rotate Plane-Polarized Light (5.12) 

The prefixes ft and S are labels used in nomenclature. Rules on assigning ft,S are found in Section 5.6. 

The prefixes d (or +) and I (or -) tell the direction a compound rotates piane-polarized light (5.12). 

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