Chem
posted by Jenny .
How do I estimate the optical roation of an (S)enantiomer if I know the optical rotation to the (R)enantiomer?
For instance, for limonene, after conducting an experiment, I got that the optical rotation for the (R)enantiomer was 10, would the (S) be 10?
Any help would be great.

Yes, the R and S forms are the negative of each other.

If your rotations are Sepcific Rotations (do a Google search for the definition] then DrBob is correct. If your R and S samples are of different concentrations or the path length is different, then you would need to calculate the expected rotation.