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Topic: R/S nomenclature for stereoisomers - Benzene ring as 1 group?  (Read 5546 times)

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Offline SheffieldWednesday4ever

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R/S nomenclature for stereoisomers - Benzene ring as 1 group?
« on: November 25, 2009, 09:16:20 PM »
Hi Everyone,

Could someone tell me, when prioritizing the groups around the chiral carbon, do I consider a benzene ring, or any other aromatic as one group? or should I consider just the first carbon attached to it?

Thanks for reading
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Offline Dan

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Re: R/S nomenclature for stereoisomers - Benzene ring as 1 group?
« Reply #1 on: November 26, 2009, 04:23:28 AM »
Initially just the first carbon attached to it. You may have to consider the next one attached to that afterwards, then the next one, and so on in cases where the first carbon has the same priority as another substituent.
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Offline AWK

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Re: R/S nomenclature for stereoisomers - Benzene ring as 1 group?
« Reply #2 on: November 26, 2009, 08:54:56 AM »
http://en.wikipedia.org/wiki/Cahn–Ingold–Prelog_priority_rules
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