DAT destroyer 2012 Orgo #86 pg 27

[clubwestpua]

Why does D only has enantiomers?

It has 2 chiral centers once BR2 are added which enables it to have two chiral carbons having different R/S configurations.

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[ttpharm]

Why does D only has enantiomers?

It has 2 chiral centers once BR2 are added which enables it to have two chiral carbons having different R/S configurations.

if you can upload a picture or tell me what its adding to then I can help you. I don't have destroyer anymore.

 

[facecrime]

Here

 

[ttpharm]

For D, I'm getting one structure with R,R and the other structure is S,S. So they are enantiomers. Diastereomers are structure with atleast 1 chiral center with opposite R/S config at a chiral center. If all of them are the exact opposite R/S config, then they are known as enantiomers. If not all, then diastereomers. I hope that makes sense. Its really early.

So if one structure is R,R and the other is R,S then this is diastereomer.
If its R,R and the other is S, S then they are enantiomers.

 

[Dotoday]

Because the other answer you get with different R and S configurations are Meso compounds since they have an internal plane of symmetry. That means they are not optically active. Hope this helps.

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