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Dextorotory or levorotory

  1. Oct 26, 2009 #1
    how can i tell if a molecule is dextorotory or levorotory by looking at the 3-d presentation? any thoughts!
  2. jcsd
  3. Oct 27, 2009 #2
    No, we can not judge this just looking at the 3-d presentation of a compound.
    It is judged by experimentation.

    We pass plane-polarized light through the compound..
    if the compound rotates the light clockwise, it is said to be dextro-rotatory..
    and if the compound rotates the light anti-clockwise, it is said to be levo-rotatory.
  4. Oct 27, 2009 #3


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    There is some work in that field. I remember something about the requirement to compare a part or sub structure's rotary power of a larger molecule and apply the result across the entire molecule. References within http://www.sciencedirect.com/scienc...erid=10&md5=7b2dce750534a20105a5a375820dfe5c" (specifically, J. Org. Chem. 2003, 68, 5186) should describe one group's efforts along those lines. If you are close to a library, you might look it up.
    Last edited by a moderator: Apr 24, 2017
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