Question: Are these compounds enantiomers?

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Attempt: The compounds given are mirror images. But if I rotated the three bonds in the third carbon (configuration will not change), I will get a meso compound (plane of symmetry) : enter image description here

So are these compounds enantiomers or meso compounds?

  • $\begingroup$ Aren't there some restrictions for flipping/rotation of Fischer projections . $\endgroup$ – Sujith Sizon Oct 22 '15 at 10:58
  • $\begingroup$ Answer given is meso. At room temperature, rotation about any one single bond can take place. Interchanging 3 groups will not change configuration. $\endgroup$ – Aditya Dev Oct 22 '15 at 11:00

You are right, the 2 structures are equivalent and the substance has a plane of symmetry and is a meso compound. When in doubt, make a 3D model if possible.

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