Cis and Trans

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Rebekah_Park_2C
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Cis and Trans

Postby Rebekah_Park_2C » Mon Nov 09, 2015 6:38 pm

What is the difference between a cis and trans?

Samantha Geere
Posts: 14
Joined: Fri Sep 25, 2015 3:00 am

Re: Cis and Trans

Postby Samantha Geere » Mon Nov 09, 2015 6:50 pm

For geometric isomers, cis and trans indicate where individual atoms are located. An isomer with the prefix cis- indicates that two atoms are on the same side of a molecule. An isomer with the prefix trans- indicates that the two atoms are across from each other. For example, cis 1,2 dichloroethene has two chlorine atoms on the same side of the carbon-carbon double bond whereas trans 1,2 dichloroethene has two chlorine atoms across the double bond from each other.

cis-
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trans-
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