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D and L Convention

  1. Dec 22, 2014 #1
  2. jcsd
  3. Dec 22, 2014 #2
    It is a rotation around the axis defined by the C4-C5 bond by 60°. Bonds are allowed to rotate, and do so very quickly without changing stereochemistry. Imagine the three substituents on C5 as the legs of a tripod, with the camera or whatnot as the rest of the molecule, and you may be able to see it better.

    Refer to this link for an idea about D/L. For what it's worth, I agree with that author about the whole D/L convention. It always annoyed me and I never retained that information beyond whatever exam I needed to know it for.
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