3.7 Optical Isomerism
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Optical isomers
Non-superimposable mirror images
Requirements for optical isomers
Carbon atom with four different atoms/groups bonded to it
Name for the C atom at the center of an optical isomer
Chiral carbon (asymetrical carbon)
Name for optical isomers
Enantiomers
Effect of optical isomers on plane polarised light
They rotate plane polarised light by the same amount but in opposite directions
Racemic mixture
A mixture of equal amounts of the two enantiomers
Will a racemic mixture rotate plane polarised light
No - The two enantiomers will cancel each other out as they are present in equal quantities
What causes a mixture to be racemic?
The shape of the reactant / intermediate, which has an equal probability of reacting in two different places