Orgo question about R/S

[tisler]

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Does COOH has higher priority than X, N, and O??
This has been confusing me for a while.
Thanks!!

 

[alanan84]

No, you assign priority by atomic number

 

[condoleezarice]

Edit: oops! my mistake. didn't read the title clearly.

 

[klutzy1987]

They have priority when naming a compound, but not in regards to R and S.