Concept explainers
(a)
Interpretation:
The rotation of R-lactic acid has to be predicted.
Concept introduction:
Enantiomer has asymmetric centers, so it shows optical activity.
If Enantiomer that rotates plane polarized light in counterclockwise direction, then it is called levorotatory.
If Enantiomer that rotates plane polarized light in clockwise direction, then it is called dextrorotatory.
Pair of enantiomers has different optical activity, which means if one will show levorotatory then the other will show dextrorotatory.
(b)
Interpretation:
The rotation of R-sodium lactate has to be predicted.
Concept introduction:
Enantiomer has asymmetric centers, so it shows optical activity.
If Enantiomer that rotates plane polarized light in counterclockwise direction, then it is called levorotatory.
If Enantiomer that rotates plane polarized light in clockwise direction, then it is called dextrorotatory.
Pair of enantiomers has different optical activity, which means if one will show levorotatory then the other will show dextrorotatory.
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Essential Organic Chemistry, Global Edition
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