I had a question on a quiz that asked if the compound below was meso or not. I thought that it would be meso because there is a plane of symmetry going through the two methyls, but the answer was that it is not meso. I'm pretty sure that plane of symmetry is allowed to go through atoms, so I was wondering why it wasn't meso.

trans-1,4 dimethylcyclohexane

*If the picture isn't showing up, it is a trans-1,4 dimethylcyclohexane

  • $\begingroup$ What is a meso, come to think of it? $\endgroup$ Commented Oct 20, 2021 at 14:13
  • $\begingroup$ In meso compounds plane goes between atoms, otherwise you have identical substituents - no chiral center! $\endgroup$
    – Mithoron
    Commented Oct 20, 2021 at 14:24
  • $\begingroup$ A meso compound must have an associated d,l pair, like the three tartaric acids. $\endgroup$
    – user55119
    Commented Oct 20, 2021 at 15:48

1 Answer 1


I found the answer on a past post here:Does 1,4-dimethylcyclohexane have a chiral center?

seems that it is not a meso compound because it does not have a chiral center.

  • $\begingroup$ Minus one because you should have commented with the link or reported the duplicate. $\endgroup$
    – Alchimista
    Commented Oct 21, 2021 at 7:11

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