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As I continue to read up on meso compounds, the more I get confused. By definition, a meso compound is a compound that is achiral even though it contains chirality centers. One quick way to determine if it's a meso compound is if it has a plane of symmetry. Okay, I get that, but here is where I get confused......
trans-2-butene + Br2 produces (2S,3R)-Dibromobutane (meso) and (2R,3S)-Dibromobutane (meso).
Upon close inspection, the products are suppose to be identical. BUT, are they really identical when the configurations at each chirality center is different?? How is 2S the same as 2R?? And 3S the same as 3R?? And with these products, where is the plane of symmetry drawn??
I don't get it...
trans-2-butene + Br2 produces (2S,3R)-Dibromobutane (meso) and (2R,3S)-Dibromobutane (meso).
Upon close inspection, the products are suppose to be identical. BUT, are they really identical when the configurations at each chirality center is different?? How is 2S the same as 2R?? And 3S the same as 3R?? And with these products, where is the plane of symmetry drawn??
I don't get it...