Cis- vs. Trans-

(Polar molecules, Non-polar molecules, etc.)

Moderators: Chem_Mod, Chem_Admin

Isabelle Bautista 3H
Posts: 23
Joined: Fri Sep 29, 2017 7:06 am

Cis- vs. Trans-

Postby Isabelle Bautista 3H » Tue Nov 14, 2017 1:34 pm

Does this refer to the orientation of the dipoles around the molecule?

Salman Azfar 1K
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: Cis- vs. Trans-

Postby Salman Azfar 1K » Tue Nov 14, 2017 2:35 pm

It implies what side of the double bond something is located on. Two things are on the same side for cis and opposite for trans. It doesn't directly define where the dipoles are but the location of the atoms around the double bond affects the dipole directions so it is quite important.

Posts: 50
Joined: Fri Sep 29, 2017 7:03 am

Re: Cis- vs. Trans-

Postby Jessica_Singh_1J » Thu Nov 16, 2017 4:35 pm

These terms don't directly refer to the orientation of dipoles around the molecule. Cis- and trans- are used to describe geometric isomerism (isomers are molecules with the same molecular formula but different arrangements of individual atoms in space). If two groups are located on the same side of the molecule, we use cis-; if they are located on opposite sides, we use trans-.

Jana Sun 1I
Posts: 52
Joined: Sat Jul 22, 2017 3:00 am

Re: Cis- vs. Trans-

Postby Jana Sun 1I » Fri Nov 17, 2017 1:34 am

However keep in mind that due to the differences in the shapes of cis- and trans- molecules (described by previous comments), cis molecules are often polar while trans molecules are often nonpolar!

aaron tang 2K
Posts: 49
Joined: Thu Jul 27, 2017 3:01 am

Re: Cis- vs. Trans-

Postby aaron tang 2K » Fri Nov 17, 2017 11:07 pm

Cis and Trans represents the geometric isomerism. If 2 groups are on the same side, then it is a cis and if the other groups are on opposite side then it is a trans

Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 2 guests