For lab we used an Mn Catalyst for epoxidation of trans-B-methyl styrene. One of the problems is that we have to figure out which enantiomer of the trans-B-methylstyrene epoxide is formed by looking at the H NMR. I have never looked at an NMR before to try to figure out which enantiomers were present. Does anyone know what I should look for in order to determine which enantiomers are present or at least a website that explains how to look at NMR for different enantiomers? Also, what is enantiomer excess (ee) and how can it be calculated from the NMR? Is it by integration?