Cis Trans

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Dianna Grigorian 1C
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Joined: Wed Sep 21, 2016 2:55 pm

Cis Trans

Postby Dianna Grigorian 1C » Fri Mar 17, 2017 1:42 pm

I'm still a little confused on how we can identify "cis" or "trans" on a cyclohexane with regards to the substituent groups. Can someone please explain this again

Shruti Amin 1E
Posts: 13
Joined: Wed Sep 21, 2016 2:58 pm

Re: Cis Trans

Postby Shruti Amin 1E » Fri Mar 17, 2017 4:43 pm

Cis is the same side, and trans is opposite sides. You have to look at the two highest priority groups. So for example, if you are looking at a double bond and the two highest priority groups (most complex molecules) are on the same side (both up) or both down, then it is Cis. Trans is across from eachother.

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Re: Cis Trans

Postby ariana_cruz_1C » Fri Mar 17, 2017 5:16 pm

Just to add on, you also want to look at if the two priority groups on the cyclohexane are axial or equatorial. If they are both axial up or both axial down /both equatorial up or both equatorial down, it will be Cis. If one priority group is axial up and the other is axial down then it is considered trans.

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Re: Cis Trans

Postby Benjamin_Oh_3O » Sat Mar 18, 2017 2:54 pm

Also simply thinking, if it's CIS, both of substituent should be located at carbon where it's pointing downward. that's how i usually do...

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