stereochemistry - What happens when you have 4 different...

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1 Stereochemistry What happens when you have 4 different substituents around sp 3 carbon? Non-superimposable mirror images:
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2 All it takes is… What is happening? • A plane of symmetry or if you like, a mirror plane is now present making the molecule achiral CH 3 Br H H 3 C A plane through the H and Br has the same reflection--a mirror plane. Stereochemistry: Definitions • Chiral: having handedness; a chiral molecule has a nonsuperimposable mirror image. Chrial molecules do not have a plane of symmetry • Stereogenic center: sometimes called a chiral center; an atom (usually carbon) is bonded to 4 different substituents. • Enantiomers: nonsuperimposable mirror image molecules Diastereomers: a configurational isomer that is not a mirror image (non-mirror image stereoisomers) • Optical Activity: the rotation of plane polarized light. An optically active sample contains chiral molecules. However, an optically inactive sample may still contain chiral molecules (e.g., a racemic mixture).
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3 How do we tell the mirror images apart?
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stereochemistry - What happens when you have 4 different...

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