stereoisomers: optical isomers part 2
DESCRIPTION
Stereoisomers: Optical Isomers PART 2. CH21 Problem Solving Class. Sample Problem. Sample Problem. S. R. S. S. enantiomers. same. S. S. R. R. same. same. Review Problem. Review Problem. Diastereomers. Diastereomers. Sample Problem. - PowerPoint PPT PresentationTRANSCRIPT
Stereoisomers: Optical Isomers
PART 2CH21 Problem Solving Class
Sample Problem
Sample Problem
S S S
R RS S
R
enantiomers
same
same
same
Review Problem
Review Problem
Diastereomers
Diastereomers
Sample Problem
Epimers: Special Diastereomers, different with ONE chiral center
Sample Problem:
Meso Compounds
Meso Compounds
Meso Compounds
Meso Compounds
Sample Problem
Sample Problem
Racemic Mixtures & Resolving
Racemic Mixtures & Resolving
Review of Isomerism
Stereochem of Reactions
Stereochem of Reactions
Sample Problem
Sample Problem
Sample Problem
• Equal chance to attack both carbons from the top, vs. both carbons from the bottom, which means you’ll have 2 racemic pairs (50:50)
• BUT THEN THESE RACEMIC MIXTURES aren’t 50:50 because of the methyl group in the ‘up’ position… meaning it won’t be a 25:25:25:25 mixture of all for, but a A:A:B:B ratio
Prochirality
Prochirality
• Using our RIGHT HAND RULE, try to see if you can get a 1-2-3 with your right hand. The face where your thumb points to is the Re face!
• Then with your left land, find 1-2-3, and you’ll find the Si face.
Prochirality• Using our RIGHT HAND RULE, try to see if you can get
a 1-2-3 with your right hand. The face where your thumb points to is the Re face!
• Then with your left land, find 1-2-3, and you’ll find the Si face.
Sample Problem
Sample Problem
Sample Problem
Sample Problem
Prochirality
Sample Problem
Sample Problem
Sample Problem
Sample Problem