Cis- versus Trans-

Moderators: Chem_Mod, Chem_Admin

Posts: 23
Joined: Fri Sep 25, 2015 3:00 am

Cis- versus Trans-

Postby HoganFenster2E » Fri Feb 26, 2016 2:04 pm

When do we indicate when an organic compound is Cis or Trans? In all of the solutions for chapter one it is never really indicated.

Posts: 19137
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 820 times

Re: Cis- versus Trans-

Postby Chem_Mod » Fri Feb 26, 2016 3:52 pm

Briefly, when you have 2 identical molecule/group on different sides of the double bond, it is trans and if they are on the same side, it is cis. Picture sources: wikipedia Image

Richmund Tan 1L
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

Re: Cis- versus Trans-

Postby Richmund Tan 1L » Fri Feb 26, 2016 4:16 pm

Additionally, cis- and trans- can refer to bonds in 3-dimensional space. If identical bonds are facing in the same direction of the z-axis (given the positive z axis points towards you), the bonds would be considered cis-. However, if one bond points in the positive z direction and the other bond points in the negative z direction, this would be considered a trans- bond.

Return to “*Alkanes”

Who is online

Users browsing this forum: No registered users and 1 guest