Priority Groups

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Lauren Su 2B
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Priority Groups

Postby Lauren Su 2B » Fri Mar 04, 2016 5:21 pm

So for determining priority, you would compare the atomic number of the atom attached to each carbon on the same side. But how would you determine priority if both groups attached to one carbon is the same (for example, if both of the atoms attached to one carbon is chlorine)?

Andre Tsivis 1K
Posts: 16
Joined: Fri Sep 25, 2015 3:00 am

Re: Priority Groups

Postby Andre Tsivis 1K » Fri Mar 04, 2016 5:32 pm

If two groups are the same, it would mean that both chains would have exactly the same formula, therefore, it would be labeled as a dichloro (for your example) or (something like )a diethyl group. Because of this, priority would not matter because the chains would be equal anyways. In the regards of Cis and Trans too, there would neither a cis nor trans form too because each end of the chain would be equal. Therefore, around the double bond, there would only be equal substituent groups/ chains.

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