What is enantiomeric excess?
1 Answer
Enantiomeric excess (
Explanation:
If we represent the mole fractions as
color(blue)(bar(ul(|color(white)(a/a) color(red)("ee" = |R - S|color(white)(a/a)|)))" "
It is often expressed as percent enantiomeric excess,
color(blue)(bar(ul(|color(white)(a/a) color(red)("% ee" = |R-S|/(R+S) × 100 %)color(white)(a/a)|)))" "
This equation is equivalent to
color(blue)(bar(ul(|color(white)(a/a)color(red)("% ee" = [α]_text(obs)/([α]_text(max)] × 100 %) color(white)(a/a)|)))" "
EXAMPLE
A compound
Solution
The enantiomeric excess is