How is 1,4,6-trichlorodiamantane optically inactive? [closed]








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[![enter image description here](https://i.stack.imgur.com/Y216p.png)](https://i.stack.imgur.com/Y216p.png)


How this compound is optically inactive I can't analyse any element of symmetry in this compound.




From this indeed Escheresque' screen photo, I *assume* the following molecular structure:


[![enter image description here](https://i.stack.imgur.com/pAZfT.gif)](https://i.stack.imgur.com/pAZfT.gif)


which reveals to be and example of



> 
>  point group $C\_s$ or a *meso*-compound
> 
> 
> 




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*Note:* There is a nice interactive symmetry gallery at [Otterbein.edu](https://symotter.org/), accessible by a web browser.


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