trans and cis attachments to cyclic carbon structures

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Emi Nakahara 3F
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Joined: Wed Sep 21, 2016 2:57 pm

trans and cis attachments to cyclic carbon structures

Postby Emi Nakahara 3F » Sun Mar 12, 2017 2:44 pm

I am confused on how you are able to tell whether a substituent is attached trans or cis to a cyclic carbon structure. In the Introduction to Organic Chemistry textbook page 60, there is an example molecule of cinnamaldehyde, and its IUPAC name includes E because the aldehyde is attached trans to carbon three on the benzene ring. But I'm not really sure what that means or how to visualize it on the molecule?

Sophia Rawson 1C
Posts: 12
Joined: Wed Sep 21, 2016 2:58 pm

Re: trans and cis attachments to cyclic carbon structures

Postby Sophia Rawson 1C » Sun Mar 12, 2017 3:26 pm

I found this a little confusing as well, but understood it more after I thought of the benzene ring as a substituent. This benzene ring substituent is trans to carbon three, where O is attached to the double bond.


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