Is ( R )-lactic acid dextrorotatory or levorotatory?

2 Answers
Apr 29, 2015

(R)-lactic acid is D(-)-lactic acid, therefore levorotatory.

Mar 7, 2017

We cannot make an interpretation about optically activeness by looking R configuration or S configuration.


For example one of compoud have R configuration can be levorotory or dextrorotary we cannot make decision about polarized light. It is also true for S configuration.

If you want to know which direction or amount of spesific rotation in polarized light, you must put your sample to polarimeter.