I am currently learning about stereochemistry in my O-chem class. I just have a few questions that I were running through my head. I know there are a lot of questions here, but they're not HW-related at all; my prof. just taught the lecture and I have had these questions on my mind. 1. How are stereogenic centers determined? Are they just locations where enantiomers can exist via "group swapping?" 2. How can one determine a "chiral diastereomer" of a organic molecule? More specifically, what if the molecule is a meso-compound (where a plane of symmetry can exist); how can you find a "chiral diastereomer" if chirality means that it can't super-impose, while the diastereomer means that they are not enantiomers? Is the diastereomer in reference to the original molecule (i.e. diastereomers are just stereoisomers that are not enantiomers with each other)? 3. Is a meso compound really just as simple as locating a plane of symmetry? Can you rotate about single bonds to "force" a meso compounds exist? Thank you.