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Homework Help: Organic Chemistry Diastereomer

  1. Mar 14, 2017 #1
    • Please post this type of questions in HW section using the template.
    Could someone explain to me why the ring structures in this photo are diastereomers? From looking at them, I see a plane of symmetry, and no chiral centers so I'm unsure how they're diastereomers without have R/S characteristics
     

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  3. Mar 15, 2017 #2

    mjc123

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    They are cis-trans or geometrical isomers. I believe these days geometrical isomers are classified as a subset of diastereomers. Chiral atoms are not necessary for diastereoisomerism.
     
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