Cis Trans Isomers

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Lusin_Yengibaryan_3B
Posts: 103
Joined: Wed Sep 30, 2020 9:33 pm

Cis Trans Isomers

Postby Lusin_Yengibaryan_3B » Sat Dec 12, 2020 1:14 am

How heavily will the final on 12/14/20 focus on cis/trans isomers? Can someone please explain a little better the concept of cis/trans isomers and how to determine them?

Hazelle Gunawan 3G
Posts: 95
Joined: Wed Sep 30, 2020 9:52 pm

Re: Cis Trans Isomers

Postby Hazelle Gunawan 3G » Sat Dec 12, 2020 2:35 am

I'm not sure how often they'll appear on the final, but cis is basically when you have the same element on the same side of the compound and trans is when they're on opposite sides (e.g. diagonal from each other).

Evelyn Silva 3J
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Joined: Wed Sep 30, 2020 9:42 pm

Re: Cis Trans Isomers

Postby Evelyn Silva 3J » Sat Dec 12, 2020 3:03 am

An example you should know is cisplatin, which is a chemotherapy medication that has two Cl atoms on the same side. It bonds to two neighboring guanines and it stops DNA replication.

Nancy Yao
Posts: 62
Joined: Wed Sep 30, 2020 9:38 pm

Re: Cis Trans Isomers

Postby Nancy Yao » Wed Dec 16, 2020 5:33 am

It did appear in the exam and I did it wrong highly possibly.

Gustavo_Chavez_1K
Posts: 92
Joined: Wed Sep 30, 2020 9:46 pm

Re: Cis Trans Isomers

Postby Gustavo_Chavez_1K » Wed Dec 16, 2020 11:34 pm

Cis isomers are when two of the same ions are on the same side. This means that there are dipole moments present in the isomer. Trans isomers are when the ions are on opposite sides. So this means that the dipole moments essentially cancel each other out.

JTieu_1L
Posts: 135
Joined: Wed Sep 30, 2020 9:34 pm

Re: Cis Trans Isomers

Postby JTieu_1L » Wed Dec 16, 2020 11:48 pm

cis on the same side and trans on opposite (molecules with lone pairs) - refer to cisplatin as an example

205323697
Posts: 50
Joined: Tue Feb 25, 2020 12:15 am

Re: Cis Trans Isomers

Postby 205323697 » Thu Dec 17, 2020 9:00 am

How would we determine if a molecule is a cis/trans isomer based on its name?

allyssa bradley 1H
Posts: 84
Joined: Wed Sep 30, 2020 9:47 pm

Re: Cis Trans Isomers

Postby allyssa bradley 1H » Thu Dec 17, 2020 9:32 am

205323697 wrote:How would we determine if a molecule is a cis/trans isomer based on its name?


The name always includes the prefix "cis" or "trans," as we learned in lecture when it came to naming! I wonder if it's not named, if it's sort of like resonance structure where multiple versions appear, or if it's always assigned.


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