Meso question

Started by Jordwin
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Jordwin

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Can a odd-carbon chain be meso? Such as three for example? My thought process was that if there were three stereocenters, then the one in the middle would have to be r or s, so it couldn't be meso. Thoughts?
 
Is this sort of what you mean?



The first one looks meso to me (five carbons)? The one with three carbons below lacks the symmetry so I would say no to that one.

What do you think?