[p-orbs]

I have a hard time dealing with stereochemistry and chiral molecules in general.
This time I'm dealing with the molecule Carvone. Seems I can't figure out how to upload an image here, so I'll post
a wikilink showing the compound instead: http://upload.wikimedia.org/wikipedia/commons/b/bf/Carvone.svg


How come the (+)-Carvone is given an S-designation? I think I'm troubling with the prioritizing of the substituents as
I feel like I should give priority to the doublebonded oxygen, and not the doublebonded carbon.
Could someone please be an angel and explain?? 

[AWK]

http://voh.chem.ucla.edu/vohtar/fall01/30A/pdf/carvone.pdf

[discodermolide]

I have a hard time dealing with stereochemistry and chiral molecules in general.
This time I'm dealing with the molecule Carvone. Seems I can't figure out how to upload an image here, so I'll post
a wikilink showing the compound instead: http://upload.wikimedia.org/wikipedia/commons/b/bf/Carvone.svg


How come the (+)-Carvone is given an S-designation? I think I'm troubling with the prioritizing of the substituents as
I feel like I should give priority to the doublebonded oxygen, and not the doublebonded carbon.
Could someone please be an angel and explain?? 

Study the Cahn-Ingold-Prelog designation for the assignment of R & S configuration.

[fledarmus]

I feel like I should give priority to the doublebonded oxygen, and not the doublebonded carbon.
Could someone please be an angel and explain?? 

Which double-bonded carbon?  Remember, the Cahn-Prelog-Ingold rules require you to prioritize atom by atom through your substituents, not by total substituent size